Q1) What is defined as the transfer of energy that occurs when a force is applied over a distance?

a) Power

b) Energy

c) Work

d) Force

Answer: c) Work

Q2) Which of the following quantities represents the capacity to do work?

a) Force

b) Power

c) Energy

d) Momentum

Answer: c) Energy

Q3) Work is calculated as the product of:

a) Force and time

b) Distance and velocity

c) Force and displacement in the direction of the force

d) Mass and acceleration

Answer: c) Force and displacement in the direction of the force

Q4) The SI unit of work and energy is:

a) Joule

b) Watt

c) Newton

d) Kilogram

Answer: a) Joule

Q5) What is the work done by a force when the force is perpendicular to the displacement?

a) Minimum

b) Maximum

c) Zero

d) Negative

Answer: c) Zero

Q6) Kinetic energy is given by the formula:

a) KE = 1/2 mv²

b) KE = mgh

c) KE = Fd

d) KE = P/t

Answer: a) KE = 1/2 mv²

Q7) The potential energy of an object at a height above the ground is due to:

a) Its velocity

b) Its mass

c) Its acceleration

d) Its position

Answer: d) Its position

Q8) Which of the following statements is true regarding kinetic energy?

a) Kinetic energy depends only on the mass of the object.

b) Kinetic energy depends only on the height of the object.

c) Kinetic energy depends only on the velocity of the object.

d) Kinetic energy depends only on the shape of the object.

Answer: c) Kinetic energy depends only on the velocity of the object.

Q9) The work-energy theorem states that:

a) Work done on an object is equal to the change in its kinetic energy.

b) Work done on an object is equal to its gravitational potential energy.

c) Work done on an object is equal to its total mechanical energy.

d) Work done on an object is equal to its power.

Answer: a) Work done on an object is equal to the change in its kinetic energy.

Q10) Power is defined as:

a) The rate of doing work.

b) The force exerted on an object.

c) The capacity to do work.

d) The energy stored in an object.

Answer: a) The rate of doing work.

Q11) What is the SI unit of power?

a) Joule

b) Newton

c) Watt

d) Kilogram

Answer: c) Watt

Q12) A machine does 500 J of work in 10 seconds. What is its power?

a) 50 W

b) 100 W

c) 200 W

d) 5000 W

Answer: b) 100 W

Q13) Which of the following equations represents the work-energy theorem?

a) W = Fd

b) W = KE

c) W = ΔKE

d) W = PE

Answer: c) W = ΔKE

Q14) Which form of energy is associated with an object's motion?

a) Kinetic energy

b) Potential energy

c) Mechanical energy

d) Chemical energy

Answer: a) Kinetic energy

Q15) A person lifts a box vertically upwards. What happens to the gravitational potential energy of the box?

a) It decreases

b) It increases

c) It remains the same

d) It becomes zero

Answer: b) It increases

Q16) Which of the following statements is true regarding conservative forces?

a) They do not depend on the path taken.

b) They always dissipate energy.

c) They are always non-contact forces.

d) They always oppose motion.

Answer: a) They do not depend on the path taken.

Q17) A machine does 1000 J of work in 5 seconds. What is its power?

a) 200 W

b) 250 W

c) 500 W

d) 2000 W

Answer: c) 500 W

Q18) Which of the following is a non-conservative force?

a) Gravity

b) Friction

c) Spring force

d) Tension

Answer: b) Friction

Q19) What type of energy is stored in a compressed spring?

a) Kinetic energy

b) Thermal energy

c) Gravitational potential energy

d) Elastic potential energy

Answer: d) Elastic potential energy

Q20) An object is raised to a height above the ground. Which of the following statements is true regarding its gravitational potential energy?

a) It decreases with increasing height.

b) It is maximum at the highest point.

c) It is minimum at the lowest point.

d) It remains constant throughout the motion.

Answer: b) It is maximum at the highest point.