1. What does the slope of a velocity-time graph represent?
a) Displacement
b) Distance
c) Speed
d) Acceleration
Answer: d
2. Which of the following is not a unit of speed?
a) m/s
b) km/hr
c) m²/hr
d) cm/s
Answer: c
3. What is impulse equal to?
a) Change in force
b) Change in velocity
c) Change in momentum
d) Change in acceleration
Answer: c
4. A metal ball and a rubber ball, each with equal mass, strike a wall with the same velocity. The rubber ball rebounds while the metal one does not. What can we conclude?
a) The rubber ball undergoes greater change in momentum
b) The metal ball undergoes greater change in momentum
c) Both experience equal change in momentum
d) The rubber ball had higher initial momentum
Answer: a
5. A bomb at rest explodes into many small fragments. What is the total momentum of all fragments?
a) Zero
b) Depends on total mass
c) Depends on speeds of fragments
d) Infinite
Answer: a
6. Why does a cannon recoil after firing?
a) Conservation of energy
b) Backward thrust of gases
c) Newton’s third law of motion
d) Newton’s first law of motion
Answer: c
7. When a moving car stops suddenly, passengers lean forward due to:
a) Centrifugal force
b) Inertia of rest
c) Inertia of motion
d) Gravitational force
Answer: c
8. A pilot should release a bomb:
a) Exactly above the target
b) After passing the target
c) Before reaching the target
d) None of these
Answer: c
9. A sphere rolls down two inclined planes of different angles but same height. It will:
a) Take equal time on both
b) Reach the bottom with same speed
c) Take same time with same speed
d) Have same kinetic energy and time
Answer: b
10. A person runs before performing a long jump to take advantage of:
a) Inertia of motion
b) Friction
c) Moment of a force
d) Principle of moments
Answer: a
11. If an object moving in a straight line changes its speed, its motion is called:
a) Uniform motion
b) Periodic motion
c) Circular motion
d) Non-uniform motion
Answer: d
12. What is the primary function of ball bearings in a wheel?
a) To increase friction
b) To convert sliding friction into rolling friction
c) To convert static friction into kinetic friction
d) Just for convenience
Answer: b
13. To open a door with less effort, the handle should be placed:
a) Near the hinges
b) Far from the hinges
c) In the middle
d) Doesn’t matter
Answer: b
14. An object moving with uniform speed in a circular path is said to be in:
a) Uniform speed
b) Uniform acceleration
c) Uniform velocity
d) Uniform circular motion
Answer: a
15. An object with constant speed may still be:
a) Non-accelerated
b) Accelerated
c) Always accelerated
d) Moving with constant velocity
Answer: b
16. A body’s moment of inertia does not depend on:
a) Axis of rotation
b) Angular velocity
c) Shape or form of mass
d) Distribution of mass
Answer: b
17. The distance-time graph of an object moving with constant speed is a:
a) Dot
b) Circle
c) Straight line
d) Curve
Answer: c
18. What is the term for raising the outer edge of curved roads to ensure vehicles take a safe turn?
a) Banking of roads
b) Cornering of roads
c) Elevation of roads
d) Tempering of roads
Answer: a
19. Railway tracks are banked on curves primarily to:
a) Obtain centrifugal force from the weight
b) Avoid friction between wheels and track
c) Provide centripetal force from horizontal component of weight
d) Prevent train from falling inward
Answer: c
20. Jet engines operate on the principle of conservation of:
a) Heat
b) Mass
c) Linear momentum
d) Angular momentum
Answer: c