3. Energy and Work
Conservation Of Energy — Quiz
Test your understanding of conservation of energy with 5 practice questions.
Practice Questions
Question 1
A block is pulled across a rough horizontal surface at a constant velocity. If the applied force is $F$ and the displacement is $d$, what is the net work done on the block?
Question 2
A ball is thrown vertically upward. At its maximum height, what is the relationship between its kinetic energy ($KE$) and potential energy ($PE$) relative to the ground?
Question 3
A 0.5 kg apple falls from a tree 3 meters high. What is its speed just before it hits the ground, assuming no air resistance? (Use $g = 9.8 \ \text{m/s}^2$)
Question 4
When a car brakes, its kinetic energy is converted primarily into what form of energy due to friction?
Question 5
A spring is stretched by a distance $x$. If the spring constant is $k$, what is the formula for the elastic potential energy stored in the spring?