SSS Two Physics Objective Examination Questions

   

1. A geometric figure defined by three reference frames is known as

A.  space
B.  plane
C.  bearing
D.  coordinate

     

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2. When a body assumes constant velocity

A.  its acceleration , a = 0
B.  the total time taken, t = 0
C.  the total distance covered, s = 0
D.  none of the above

     

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3. Which of these is not an equation of a uniformly accelerated motion?

A.  s = at + 2ut²
B.  v = u + at
C.  s = ut + ½ at²
D.  v² = u² + 2as

     

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4. Given A(1,2) and B(3,4), the distance AB is

A.  8.22m
B.  2.83m
C.  1.41m
D.  4.11m

     

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5. Which of the following is not a vector quantity?

A.  force
B.  displacement
C.  altitude
D.  acceleration

     

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6. Acceleration is defined as

A.  $\frac{dis\tan ce}{time}$

B.  distance × time
C.  displacement × time

D.  $\frac{velocity}{time}$

     

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7. A body moving with an initial velocity U accelerates until it attains a velocity of V within time t. the distance, S covered by the body is given by the expression      

A.   $s=\left(\frac{v-u}{2}\right)t$

B.    $s=\left(\frac{v+u}{2}\right)t$

C.    $s=\left(\frac{v+2u}{2}\right)t$

D.    $s=\left(\frac{2v-u}{2}\right)t$

     

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8. For a projectile, the maximum range is obtained when the angle of projection is

A.  60°
B.  45°
C.  75°
D.  90°

     

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9. A motor vehicle is brought to rest at a speed of 15m/s in 20s. calculate the retardation

A.  0.75$m/s^2$
B.  1.33$m/s^2$
C.  7.50$m/s^2$
D.  5.00$m/s^2$

     

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10. The measure of equal distance covered in equal time intervals is known as

A.  uniform velocity
B.  uniform speed
C.  actual speed
D.  average velocity

     

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Use the information below to answer questions 11 to 13
If two vector forces F1=10N and F2= 12N act together, find their resultant force if

11. They act in the same direction

A.  10N
B.  12N
C.  22N
D.  2N

     

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12. They act in the opposite direction

A.  12N
B.  10N
C.  22N
D.  2N

     

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13. They are inclined at 70° to each other

A.  81.10N
B.  40.20N
C.  16.50N
D.  60.40N

     

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14. A particle starts from rest and moves with a constant acceleration of 0.5m/s2. The distance covered by the particle in 10s is

A.  2.5m
B.  25.0m
C.  5.0m
D.  50.0m

     

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15. When an object moves or accelerates from rest

A.  its initial velocity, u = 0
B.  its final velocity, v = 0
C.  its acceleration, a = 0
D.  all of the above

     

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16. Convert 72km/hr to m/min

A.  120m/min
B.  1200m/min
C.  12m/min
D.  12000m/min

     

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17. The S.I unit of the moment of force is

A.  Kgm
B.  Jm
C.  Nm
D.  N/m

     

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18. A boy cycles continuously through a distance of 1.0km in 5 minutes. Calculate his average speed

A.  33.30m/s
B.  1.11m/s
C.  11.10m/s
D.  3.33m/s

     

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Use the information below to answer questions 19 and 20
A force 150N is inclined at 500 to the horizontal direction. Find its component in the

19. Horizontal direction

A.  69.24N
B.  42.96N
C.  24.69N
D.  96.42N

     

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20. Vertical direction

A.  141.19N
B.  411.91N
C.  111.49N
D. 114.91N

     

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21. A train has an initial velocity of 44m/s and an acceleration of -4$m/s^2$. Its velocity after 10s is

A.  4m/s
B.  8m/s
C.  2m/s
D.  6m/s

     

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22. Velocity is defined as

A.  $\frac{dis\tan ce}{time}$
B.  $\frac{displacement}{time}$
C.  $dis\tan ce\times time$
D.  $\frac{velocity change}{time}$

     

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23. The point through which the resultant weight of an object acts is known as

A.  field
B.  equilibrium
C.  center of gravity
D.  point of stability

     

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24. The following are three types of stability except

A.  stable equilibrium
B.  unstable equilibrium
C.  neutral equilibrium
D.  coplanar equilibrium

     

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Use the information below to answer questions 25 and 26
If two vector forces F1 = 5N and F2 = 6N are inclined at right angle (I.e θ = 90°), calculate

     

25. The magnitude R

A.  8.71N
B.  1.78N
C.  4.44N
D.  7.82N

     

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26. The direction ∝

A.  93.80°
B.  50.19°
C.  39.80°
D.  98.30°

     

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Use the information below to answer questions 27 to 30
A stone is projected upwards at an angle of 30° to the horizontal with an initial velocity of 100m/s. calculate

27. The time, t taken to reach maximum height

A.  10s
B.  5.1s
C.  2.5s
D.  75s

     

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28. The time of flight, T

A.  10.2s
B.  5s
C.  15s
D.  7.5s

     

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29. The maximum height, H

A.  127.55m
B.  215m
C.  521m
D.  251m

     

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30. The range, R of projection

A.  686.025m
B.  883.32m
C.  205.866m
D.  50.668m  

     

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31. The momentum P of a body is defined as

A.  Force x Mass
B.  Velocity x Time
C.  Impulse x Time
D.  Mass x Velocity

     

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32. A net force of magnitude 0.6N acts on a body of mass 40g initially at rest. Calculate the magnitude of the resulting acceleration

A.  15 x 10^-2$m/s^2$
B.  15 x 10^-1$m/s^2$
C.  15$m/s^2$
D.  1.5 $m/s^2$

     

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33. The device used for measuring the quantity of heat supplied to a substance is called

A.  Heater
B.  Calorimeter
C.  Beaker
D.  Cylinder

     

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34. A ball of mass 0.5kg moving at 10m/s collides with another ball of equal mass at rest. If the two balls move off together after impact, calculate their common velocity

A.  5m/s
B.  2.5 m/s
C.  10m/s
D.  15m/s

     

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35. For a perfectly inelastic collision

A.  Only momentum is covered
B.  Only kinetic energy is conserved
C.  Both momentum and kinetic energy are conserved
D.  Both momentum and kinetic energy are not conserved

     

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36. A machine is rated as being 60% efficient. This means that it converts

A.  60 joules out of every 100 put in, into useful energy
B.  40 joules out of every 100 put in, into useful energy
C.  60 joules out of every 60 put in, into useful energy
D.  40 joules out of every 60 puts, into useful energy

     

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37. Water without impurities boils at

A.     0^oC
B.    4^oC
C.    104^oC
D.    100^oC

     

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38. The specific heat capacity of a substance is measured in

A.  JKgK
B.  J/K
C.  J/KgK
D.  JK

     

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39. A resistance thermometer has a resistance of 10α at 0°C and 90α at 100°C.  if it records 55α in a certain medium, calculate the temperature of the medium

A.  18^oC
B.  75^oC
C.  57^oC
D.  38^oC

     

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40. A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio

A.  1.875
B.  8.175
C.  5.817
D.  7.185

     

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41. Water is said to be anomalous

A.  At 0^oC
B.  Between 0^oC to 40^oC
C.  At 4^oC
D.  At 100^oC

     

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42. The Fahrenheit scale has an upper fixed point temperature of

A.  273^oF
B.  212^oF
C.  32^oF
D.  373^oF

     

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43. How much heat energy will be needed to change the temperature of 275g of paraffin oil by 75K (SHC of paraffin oil = 2130J/KgK)

A.  13934.52J
B.  25439.31J
C.  93142.35J
D.  43931.25J

     

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44. An object is heated from 30^oC to 57^oC.  What is the increase in its temperature on the Kelvin scale?

A.  27K
B.  87K
C.  300K
D.  273K

     

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45. Which of the following is a second-order lever?

A.  Plier
B.  Wheelbarrow
C.  Crowbar
D.  Hammer

     

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46. The velocity ratio (V.R) for a screw is given by

A.  $\frac{2\pi r}{p}$

B.  $\frac{1}{\sin \theta }$  

C.  $\frac{x}{y}$  

D.  $\frac{2\pi R}{2\pi r}$  

     

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Use the information below to answer questions 47-49
A truck of mass 3200kg moving with a velocity of 10m/s increases its velocity to 20m/s in 5s. Calculate

47. The change of momentum of the engine

A.     64 x 10³kgm/s
B.    96 x 10³kgm/s
C.    32 x 10³kgm/s
D.    16 x 10³kgm/s

     

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48. The magnitude of the force exerted on the engine

A.  1600N
B.  9600N
C.  6400N
D.  3200N

     

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49. The impulse on the engine

A.  1.6 x 10⁴Ns
B.  9.6 x 10⁴Ns
C.  6.4 x 10⁴Ns
D.  3.2 x 10⁴Ns

     

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50. For a third-order lever

A.  The load (L) is between the effort (E) and the Fulcrum (F)
B.  The Fulcrum (F) is between the load (L) and the effort (E)
C.  The Effort (E) is between the Load (L) and the Fulcrum (F)
D.  All of the above

     

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51. A boy drags a bag of rice along a smooth horizontal surface (floor) with a force of 2N applied at an angle of 600 to the floor. What is the work done after 3m

A.  6J
B.  3J
C.  2J
D.  5J

     

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52. Which of the following is not a type of machine

A.  Rope
B.  Wedge
C.  Screw
D.  Wheel and Axle

     

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53. The thermometric substance for a thermocouple is?

A.  Alcohol
B.  Gas
C.  Resistance wire
D.  Current flow

     

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54. Which of the following is not a feature of a thermometer

A.  Construction
B.  Sensitivity
C.  Calibration
D.  Conduction

     

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55. The S.I unit of temperature is

A.  K
B.  ^oC
C.  ^oF
D.  None of the above

     

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56. The difference in temperature between the upper fixed point and the lower point temperatures is called

A.  Temperature change
B.  Fundamental interval
C.  Temperature rise
D.  Fundamental change

     

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57. Calculate the quantity of heat required to change 200g of ice to water at ^oC (SHL of fusion of ice = 336J/g)

A.  33300J
B.  27600J
C.  67200J
D.  72600J

     

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58. What is the efficiency of the wheel and axle

A.  $\frac{M.A}{V.R}\times 100\%$  
B.  $\frac{L\times y}{E\times x}\times 100\%$
C.  $\frac{wo}{wi}\times 100\%$
D.  $\frac{wo}{wi}\times 100\%$

     

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59. The quantity of heat required or needed or supplied at ^oC to change the state of a substance is given by

A.  Q = mL
B.  Q = Pt
C.  Q = mCΔθ
D.  Q = IVt

     

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60. What is the velocity ratio (V.R) of a plane inclined at 30°

A.  1
B.  2
C.  3
D.  4  

     

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61. At what value of x, y and z is the equation $P_x{V}_y{T}_z=$ constant, a statement of General gas law?

A.  x = 1, y = 1 and z = -1
B.  x = 1, y = 0 and z = -1
C.  x = 1, y = 1 and z = 0
D.  x = 0, y = 1 and z = -1

     

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62. The ratio of the displacement of a vibrating particle(s) at any instant to the amplitude of the vibrating particle(s) is called

A.  Cycle
B.  Phase
C.  Amplitude
D.  Frequency

     

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63. All the following are mechanical waves except

A.  Sound waves
B.  Water waves
C.  Light waves
D.  Waves on a string

     

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64. The phenomenon of light travelling in straight lines is known as

A.  Interference of light
B.  Irregular propagation of light
C.  Diffraction of light
D.  Rectilinear propagation of light

     

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65. A gas at a volume V_o in a container at pressure Po is compressed to one-fifth of the volume. What will be its pressure if it maintains its original temperature T?

A.  2P_o
B.  3P_o
C.  4P_o
D.  5P_o

     

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66. If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?

A.  14°
B.  81°
C.  42°
D.  59°

     

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67. The speed of light in air is given by a constant value of

A.  8.0 x 10³m/s
B.  3.0 x 10⁸m/s
C.  330.0 x 10⁸m/s
D.  340.0 x 10³m/s

     

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68. Materials that allow a small amount of light falling on them to pass through are said to be

A.  Translucent
B.  Opaque
C.  Transparent
D.  Luminous

     

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69. A collection of rays is called

A.  Beam
B.  Waves
C.  Light
D.  Image

     

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70. An object is placed 10cm in front of a concave mirror of a focal length of 15cm. What is the position and nature of the image formed?

A.  30cm and virtual
B.  6cm and real
C.  6cm and virtual
D.  30cm and real

     

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Use the information below to answer questions 71-75
A plane progressive wave is represented by the equation y = 2sin (200πt – 0.5πx). Obtain..

71. The amplitude A

A.  4m
B.  2m
C.  6m
D.  8m

     

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72. The frequency f

A.  200Hz
B.  100Hz
C.  50Hz
D.  150Hz

     

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73. The wavelength λ

A.  6m
B.  8m
C.  4m
D.  2m

     

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74. The velocity V

A.  600m/s
B.  800m/s
C.  400m/s
D.  200m/s

     

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75. The period T

A.  0.10s
B.  100.00s
C.  1.00s
D.  0.01s

     

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76. A source of sound produces waves in air of wavelength 1.65m. If the speed of sound in air is 330m/s, what will be the period of vibration?

A.  200.000s
B.  544.500s
C.  0.010s
D.  0.005s

     

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77. All the following are characteristics of sound except

A.  Loudness
B.  Quality
C.  Pitch
D.  Vibration

     

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78. At what angle Ɵ will two (2) plane mirrors be inclined so that 11 images will be formed when an object is placed in front of the two mirrors

A.  45°
B.  60°
C.  30°
D.  90°

     

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79. The eye defect in which the eye is unable to accommodate and is caused by the inelasticity of the eye lens due to old age is known as

A.  Hypermetropia
B.  Presbyopia
C.  Myopia
D.  Astigmatism

     

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80. The effect where the image of an object placed in front of a plane mirror appears or looks like a reversal of the object is known as

A.  Lateral inversion
B.  Rectilinear inversion
C.  Real inversion
D.  Virtual inversion

     

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81. An instrument used mostly for viewing across a barrier is called

A.  Telescope
B.  Microscope
C.  Camera
D.  Periscope

     

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82. A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? (refractive index of water = $\left(\frac{4}{3}\right)$

A.  5.0m
B.  8.0m
C.  4.5m
D.  5.5m

     

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83. A ray of light is incident at an angle of 30o° at an air-glass interface. Determine the angle of refraction (Refractive index of glass = 1.50)

A.  10.5°
B.  19.5°
C.  30.0°
D.  25.0°

     

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84. A fathometer sends a wave down to the sea be
D.  The reflected wave is received after 0.5 seconds. Calculate the depth of the se

A.  (Speed of sound in water = 1500m/s)
A.  375m
B.  123m
B.  148m
C.  750m

     

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85. By what factor will the size of an object placed 10cm from a convex lens be increased if the image is seen on a screen placed 25cm from the lens?

A.  2.5
B.  15.0
C.  1.5
D.  0.4

     

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86. The type of wave that does not require a material medium for its propagation is referred to as

A.  Mechanical wave
B.  Electromagnetic wave
C.  Progressive wave
D.  Stationary wave

     

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87. The image of a pin formed by a diverging lens of a focal length of 10cm is 5cm from the lens. Calculate the distance of the pin from the lens

A.  – 10cm
B.  5cm
C.  10cm
D.  – 5cm

     

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88. Linear magnification m is given by

A.  $m=\frac{u}{v}$

B.  $m=\frac{f}{u}$

C.  $m=\frac{u}{f}$

D.  $m=\frac{v}{u}$

     

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89. A thin converging lens has a power of 4.0 Diopters. Determines its focal length

A.  0.03m
B.  5.00m
C.  2.50m
D.  0.25m

     

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90. When an image formed is smaller than the object, the image is said to be

A.  Diminished
B.  Magnified
C.  Inverted
D.  Erect

     

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