Q1: 1. When a force is applied to an object for a short period of time, resulting in a change in momentum, this is known as

• A) Impulse
• B) Momentum
• C) Energy
• D) Inertia

Q2: 2. A car collides with a stationary wall. The change in momentum of the car is equal to the

• A) Impulse exerted by the wall on the car
• B) Initial momentum of the car
• C) Final momentum of the car
• D) Work done by the engine

Q3: 3. Energy methods in Engineering Mechanics involve the study of

• A) Potential energy only
• B) Kinetic energy only
• C) Both potential and kinetic energy
• D) None of the above

Q4: 4. The principle of conservation of energy states that

• A) Energy can be created but not destroyed
• B) Energy can be destroyed but not created
• C) Energy can neither be created nor destroyed
• D) Energy is always constant

Q5: 5. In a real-life scenario, a pendulum swinging back and forth demonstrates the conversion between

• A) Kinetic and potential energy
• B) Impulse and momentum
• C) Work and power
• D) Friction and resistance

Q6: 6. If a ball is thrown vertically upwards, its total mechanical energy at the highest point of its trajectory is

• A) Equal to its initial kinetic energy
• B) Equal to zero
• C) Equal to its potential energy
• D) Equal to its total energy throughout the motion

Q7: 7. When a spring is compressed and then released, the energy stored in the spring is in the form of

• A) Kinetic energy
• B) Potential energy
• C) Elastic potential energy
• D) Thermal energy

Q8: 8. The work-energy principle states that the work done on an object is equal to the

• A) Change in momentum of the object
• B) Change in kinetic energy of the object
• C) Change in potential energy of the object
• D) Change in impulse of the object

Q9: 9. In a collision between two objects, the total momentum of the system

• A) Increases
• B) Decreases
• C) Remains constant
• D) Is unpredictable

Q10: 10. A block is sliding down a frictionless incline. The potential energy of the block

• A) Increases
• B) Remains constant
• C) Decreases
• D) Fluctuates

Q11: 11. Which of the following is an example of an inelastic collision?

• A) Two billiard balls colliding
• B) A car crashing into a wall
• C) A ball bouncing off the ground
• D) Two magnets repelling each other

Q12: 12. The area under a force-displacement graph represents

• A) Work done
• B) Momentum
• C) Impulse
• D) Energy

Q13: 13. A roller coaster starts at the top of a hill with only potential energy. As it descends, its potential energy is converted into

• A) Kinetic energy
• B) Frictional energy
• C) Heat energy
• D) Elastic energy

Q14: 14. A spring with a spring constant of 200 N/m is compressed by 0.1 meters. The potential energy stored in the compressed spring is

• A) 0.02 J
• B) 2 J
• C) 20 J
• D) 200 J

Q15: 15. In a system where only conservative forces are present, the total mechanical energy of the system

• A) Remains constant
• B) Increases over time
• C) Decreases over time
• D) Is always zero

Q16: 16. A rocket is launched into space. As it accelerates upwards, its kinetic energy

• A) Increases
• B) Decreases
• C) Remains constant
• D) Becomes zero

Q17: 17. A crane lifts a load vertically upwards. The work done by the crane is equal to the change in

• A) Momentum of the load
• B) Potential energy of the load
• C) Kinetic energy of the load
• D) Frictional force on the load

Q18: 18. Which of the following is an example of an external force doing work on a system?

• A) Gravity acting on a falling object
• B) Friction between two surfaces
• C) Tension in a rope holding an object
• D) Air resistance on a moving car

Q19: 19. A ball is dropped from a height. Just before hitting the ground, its kinetic energy is

• A) Maximum
• B) Minimum
• C) Zero
• D) Constant

Q20: 20. In a perfectly elastic collision between two objects, the total kinetic energy of the system

• A) Increases
• B) Decreases
• C) Remains constant
• D) Becomes zero

Q21: 21. A car is moving at a constant speed on a flat road. The work done by the engine to maintain this speed is equal to

• A) The net force acting on the car
• B) Zero
• C) The frictional force on the car
• D) The acceleration of the car

Q22: 22. A block is pushed up an incline against gravity. The work done by the applied force is converted into

• A) Kinetic energy of the block
• B) Potential energy of the block
• C) Heat due to friction
• D) Elastic energy of the block

Q23: 23. A diver jumps off a diving board. At the highest point of the jump, the diver's kinetic energy is

• A) Maximum
• B) Minimum
• C) Zero
• D) Constant

Q24: 24. Two objects of different masses are dropped from the same height. Neglecting air resistance, which object will hit the ground first?

• A) The heavier object
• B) The lighter object
• C) Both will hit simultaneously
• D) It depends on the shapes of the objects

Q25: 25. A bowler throws a bowling ball down the lane. The work done by the bowler is equal to the change in

• A) Potential energy of the ball
• B) Kinetic energy of the ball
• C) Frictional force on the ball
• D) Impulse exerted on the ball