1. Mechanics
Work And Energy — Quiz
Test your understanding of work and energy with 5 practice questions.
Practice Questions
Question 1
A block of mass $m$ is pulled up a frictionless incline of angle $\theta$ by a constant force $F$ parallel to the incline. If the block moves a distance $d$ along the incline, what is the work done by gravity?
Question 2
A car's engine does $5 \times 10^4 \text{ J}$ of work to accelerate the car from rest to a certain speed. If the car's mass is $1200 \text{ kg}$, what is the final speed of the car, assuming no energy losses due to friction or air resistance?
Question 3
Which of the following statements accurately describes the conservation of mechanical energy in the presence of nonconservative forces?
Question 4
A ball is dropped from a height $h$. Ignoring air resistance, what is its speed just before it hits the ground?
Question 5
A person pushes a box horizontally across a floor with a force of $100 \text{ N}$ for a distance of $5 \text{ m}$. If the coefficient of kinetic friction between the box and the floor is $0.2$ and the mass of the box is $20 \text{ kg}$, what is the net work done on the box?