3. Mechanics
Work Energy — Quiz
Test your understanding of work energy with 5 practice questions.
Practice Questions
Question 1
Which of the following represents the correct relationship between work, force, and displacement when the force is at an angle $\theta$ to the direction of motion?
Question 2
A 3 kg object is moving with a velocity of 5 m/s. If no external forces act on it, what will be its kinetic energy?
Question 3
Which of the following is the correct unit of power in the International System of Units (SI)?
Question 4
An object of mass 4 kg is dropped from a height of 10 m. Assuming no air resistance and $g = 9.8 \text{ m/s}^2$, what is the velocity of the object just before it hits the ground?
Question 5
A force of 50 N is applied to push a 10 kg box along a horizontal surface for 8 m. If there is a constant frictional force of 20 N opposing the motion, what is the net work done on the box?