Adaptive Practice
Work, Energy and Power
10 questions • Earn up to 92 XP • First attempt — go for 100%!
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Question 1 of 10
⏱ 0:30
Easy
What is the SI unit of work?
Easy
A force of 10 N acts on an object and displaces it by 5 m in the direction of the force. What is the work done?
Easy
If the angle between force and displacement is 90°, what is the work done by the force?
Easy
The kinetic energy of a body of mass m moving with velocity v is given by:
Easy
A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
Medium
Which of the following statements is correct about conservative forces?
Medium
A body is lifted vertically upward through a height h with constant velocity. The work done by the gravitational force is:
Easy
Power is defined as the rate of doing work. If a machine does 500 J of work in 10 seconds, its power is:
Medium
A body of mass m is moving with velocity v. Its momentum is p. Which of the following expressions correctly relates kinetic energy (K) and momentum (p)?
Medium
A block slides down a frictionless incline of height h. What is its speed at the bottom?