Forces and Motion | Physics Mdcat | Practice Mcqs | mosaicbro.com

Forces and Motion | Physics Mdcat | Practice Mcqs

7 of 50 questions (Page 6 of 8)

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36 When velocity time graph is a straight line parallel to time axis then?
Correct Answer: C
Explanation: A horizontal line on a velocity-time graph indicates zero acceleration.
37 Which of the following is conserved in all types of collisions?
Correct Answer: D
Explanation: Momentum and total energy are conserved in all collisions, but kinetic energy is conserved only in elastic collisions.
38 An aircraft is moving along a straight path with constant velocity, its acceleration will be?
Correct Answer: A
Explanation: Constant velocity implies zero acceleration.
39 If the initial velocity of the projectile is doubled then the maximum height of the projectile will become?
Correct Answer: B
Explanation: Maximum height is proportional to the square of initial velocity (H ∝ v₀²).
40 The range of projectile is same for angles of projection?
Correct Answer: D
Explanation: Complementary angles (30° and 60°) yield the same range.
41 A car covers 2/3 distance with 60 km/hour and 1/3 distance with 20 km/hour. The average speed of car is?
Correct Answer: A
Explanation: Average speed = total distance / total time = 1 / [(2/3)/60 + (1/3)/20] = 36 km/h.
42 Equations of motion are applicable for?
Correct Answer: A
Explanation: Standard equations of motion require uniform acceleration.
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