Work Power Energy IGCSE

15 Questions | By Rajashreebasu | Last updated: Mar 22, 2022 | Total Attempts: 1720

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This quiz includes the topics on Work, Energy and Power. The quiz is consisting of 15 multiple-choice items, which are all conceptual. Time limit for the quiz is 15 minutes. Good luck.

Questions and Answers

1.

Which of the following is not a unit for power?
- A.
  
  Joule – second
- B.
  
  Watt
- C.
  
  Newton-meter per second
- D.
  
  Horsepower
2.

Car A has a mass of 1000 kg and a speed of 60 km/h, and car B has a mass of 2000 kg and a speed of 30 km/h. The kinetic energy of car A is _____.
- A.
  
  Half that of car B
- B.
  
  Equal that of car B
- C.
  
  Twice that of car B
- D.
  
  Four times that of car B
3.

If an object has kinetic energy, then it also must have _____.
- A.
  
  Speed
- B.
  
  Impulse
- C.
  
  Acceleration
- D.
  
  Force
4.

A feather and a coin are dropped in the air. Each falls with equal _____.
- A.
  
  Momenta
- B.
  
  Kinetic energies
- C.
  
  Potential energy
- D.
  
  None of the above
5.

When a bullet is fired from a rifle, the force on the rifle is equal to the force on the bullet. However, the energy of the bullet is greater than the energy of the recoiling rifle because the _______.
- A.
  
  Force on the bullet acts for a longer distance
- B.
  
  Bullet's momentum is greater than that of the rifle
- C.
  
  Force on the bullet acts for a longer time
- D.
  
  The impulse of the bullet is more
6.

An object that has kinetic energy must be _____.
- A.
  
  Moving.
- B.
  
  Falling.
- C.
  
  At an elevated position.
- D.
  
  At rest.
7.

An object that has potential energy has this energy because of its _____.
- A.
  
  Speed.
- B.
  
  Acceleration.
- C.
  
  Momentum.
- D.
  
  Location.
8.

An object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high it gains _____.
- A.
  
  Four times as much potential energy.
- B.
  
  Twice as much potential energy.
- C.
  
  Half as much potential energy
- D.
  
  Neither of these.
9.

When an object is lifted 10 meters, it gains a certain amount of potential energy. If the same object is lifted 20 meters, its potential energy is ______.
- A.
  
  Less.
- B.
  
  The same
- C.
  
  Twice as much.
- D.
  
  Four times as much
10.

Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.
- A.
  
  The same distance as the slower arrow.
- B.
  
  Twice as far as the slower arrow.
- C.
  
  Four times as far as the slower arrow.
- D.
  
  More than four times as far as the slower arrow.
11.

A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is _____.
- A.
  
  Less than 100 J.
- B.
  
  More than 100 J.
- C.
  
  100 J.
- D.
  
  Not enough information given.
12.

Strictly speaking, a car will burn more gasoline if the car radio is turned on. This statement is _____.
- A.
  
  Totally false.
- B.
  
  True only if the car's engine is running.
- C.
  
  True only if the car's engine is stopped.
- D.
  
  Always true.
13.

Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate _____.
- A.
  
  The same distance as the slower arrow.
- B.
  
  Twice as far as the slower arrow.
- C.
  
  Four times as far as the slower arrow.
- D.
  
  More than four times as far as the slower arrow.
14.

How many Joules of energy are in one kilowatt-hour?
- A.
  
  1 J
- B.
  
  60 J
- C.
  
  60 kilojoules
- D.
  
  3.6 megajoules
15.

A feather and a coin dropped in a vacuum fall with equal _____.
- A.
  
  Forces
- B.
  
  Momenta
- C.
  
  Accelerations
- D.
  
  Kinetic energies