IGCSE Physics

Which of the following statements defines work done correctly?

• A) Work done is the energy expended by an object.

• B) Work done is the force applied to an object.

• C) Work done is the displacement of an object.

• D) Work done is the transfer of energy from one object to another.

Which of the following factors affects the amount of work done on an object?

• A) Time taken to complete the work.

• B) Force applied to the object.

• C) Initial velocity of the object.

• D) Mass of the object.

In physics, work done is measured in:

• A) Newton (N).

• B) Meter per second squared (m/s^2).

• C) Joule (J).

• D) Watt (W).

Which of the following situations involves zero work done?

• A) Lifting a book off the ground.

• B) Pushing a heavy box horizontally across a room.

• C) Holding a weight stationary above your head.

• D) Running up a flight of stairs.

A force of 20 N is applied to an object that moves a distance of 5 meters in the direction of the force. What is the work done on the object?

• A) 20 J

• B) 25 J

• C) 50 J

• D) 100 J

A car exerts a constant force of 500 N to move a distance of 100 meters. What is the work done by the car?

• A) 50 J

• B) 500 J

• C) 5000 J

• D) 50 kJ

A person lifts a box weighing 50 kg vertically upward by a distance of 2 meters. What is the work done on the box? (Take g = 10 m/s^2)

• A) 100 J

• B) 2 kJ

• C) 1 kJ

• D) 1000 kJ

Which of the following statements defines power correctly?

• A) Power is the energy transferred per unit time.

• B) Power is the force applied to an object.

• C) Power is the rate at which work is done.

• D) Power is the product of force and distance.

Which of the following units is used to measure power?

• A) Newton (N)

• B) Meter per second squared (m/s^2)

• C) Joule (J)

• D) Watt (W)

If a machine does 500 Joules of work in 10 seconds, what is its power output?

• A) 5 W

• B) 50 W

• C) 100 W

• D) 500 W