Force and Motion MCQs for MDCAT Practice

Physics section, Force and Motion chapter. Sample questions from past PMC papers.

1. Question 1
   When upward acceleration of an elevator is increased the weight of the body in it is
   • A.Zero
   • B.Further increased
   • C.Negative
   • D.Constant
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2. Question 2
   Two wires of equal length and cross-section are suspended as shown. Their Young’s moduli are Y1 and Y2, respectively. The equivalent Young’s modulus will be:
   
   • A.Y1 + Y2
   • B.(Y1 + Y2) / 2
   • C.(Y1 * Y2) / (Y1 + Y2)
   • D.√(Y1 * Y2)
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3. Question 3
   An object with an initial velocity of 40m/s moves along a straight axis under constant acceleration. Three seconds later,its velocity is 14m/s. How far did it travel during this time?
   • A.81 m
   • B.17 m
   • C.67 m
   • D.57 m
   • E.77 m/s
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4. Question 4
   Which of the following expressions represent (8x3 + 125) / (2x + 5)?
   • A.4x2 – 10x – 25
   • B.4x2 – 20x + 25
   • C.4x2 + 10x + 25
   • D.4x2 – 10x + 25
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5. Question 5
   An object is taken from the earth to a planet where the value ‘g’ is 20 m/s2, if it is compared with value of ‘g’ earth, which of the following statement is true?
   • A.Weight at the planet will be greater
   • B.Weight at the Earth will be greater
   • C.Mass at the planet will be greater
   • D.Mass at the planet will be smaller
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6. Question 6
   A fireman wants to slide down a rope. The breaking load of the rope is 3/4 of the weight of the man. With what acceleration should the fireman slide down? (Acceleration due to gravity is 'g')
   • A.g
   • B.g/4
   • C.3g/4
   • D.0
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7. Question 7
   For a given value of initial velocity, the maximum range of a projectile can be achieved by throwing it at an angle of:
   • A.90°
   • B.60°
   • C.45°
   • D.30°
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8. Question 8
   A ball is projected vertically upwards from the ground with a velocity of 20 m/s. How high will it go? (Take g = 10 m/s2)
   • A.5 m
   • B.10 m
   • C.15 m
   • D.20 m
   • E.25 m
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