1. If an object moves in a circle at constant speed, which of the following is true?
a) No work is done on the object
b) No force acts on it
c) It experiences no acceleration
d) Its velocity remains constant
Answer: a
2. The average kinetic energy of the molecules of an ideal gas is directly proportional to:
a) Molecular velocity
b) Molecular mass
c) Absolute temperature of the gas
d) Environmental temperature
Answer: c
3. A car is moving uniformly at 60 km/h on a straight road. What is the net force acting on it?
a) Driving force in the direction of motion
b) Resistance force opposite to motion
c) An inclined force
d) Zero
Answer: d
4. If the speed of a car is doubled, the braking force required to stop it in the same distance becomes:
a) Four times
b) Twice
c) Half
d) One-fourth
Answer: a
5. A light-year is a unit of:
a) Speed of aeroplanes
b) Speed of rockets
c) Distance between stars
d) Speed of light
Answer: c
6. The displacement-time graph of a particle under constant force is a:
a) Straight line
b) Circle
c) Parabola
d) Curve based on initial conditions
Answer: a
7. While climbing a hill, the driver keeps the gear ratio:
a) Equal to 1
b) Less than 1
c) Greater than 1
d) Equal to or greater than 1
Answer: d
8. A particle moves in uniform circular motion with speed v and radius r. Its acceleration is:
a) 0
b) v/r
c) v/r²
d) v²/r
Answer: d
9. Among particles moving at the same speed, which has the greatest momentum?
a) Electron
b) Proton
c) Deuteron
d) Alpha particle
Answer: d
10. Momentum of an object depends on:
a) Mass only
b) Mass and speed only
c) Mass and volume only
d) Mass, speed, and volume
Answer: b
11. Which of the following has the same dimensions as impulse?
a) Volume
b) Momentum
c) Torque
d) Rate of change of momentum
Answer: b
12. While catching a ball, a player pulls down their hands to reduce:
a) Force
b) Momentum
c) Impulse
d) Catching time
Answer: b
13. The motion of bullock cart wheels on the road is an example of:
a) Oscillatory and rotational motion
b) Oscillatory and translational motion
c) Translational and rotational motion
d) Translational motion only
Answer: c
14. The spokes in a bicycle wheel increase its:
a) Moment of inertia
b) Velocity
c) Acceleration
d) Momentum
Answer: a
15. In the average velocity formula vˉ=u+v2\bar{v} = \frac{u + v}{2}vˉ=2u+v, u represents:
a) Final velocity
b) Initial displacement
c) Initial velocity
d) Final displacement
Answer: c
16. A man in a moving train drops a ball onto a platform. To a platform observer, the ball follows a:
a) Straight line
b) Circular path
c) Parabolic path
d) None of the above
Answer: c
17. If the velocity-time graph is y=mt+cy = mt + cy=mt+c, the object is moving with:
a) Constant speed
b) Constant velocity
c) Constant acceleration
d) Variable acceleration
Answer: c
18. To reduce angular speed on a freely rotating turntable, a person should:
a) Bring their hands together
b) Raise their hands
c) Spread their hands outward
d) Sit with raised hands
Answer: c
19. Rate of change of momentum is defined as:
a) Area
b) Pressure
c) Force
d) Velocity
Answer: c
20. Motion with constant speed along a straight path is called:
a) Uniform motion
b) Periodic motion
c) Circular motion
d) Non-uniform motion
Answer: a