Practice Kinetic Energy in Physics
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The energy an object possesses by virtue of its motion, depending on both mass and velocity.
The faster something moves and the heavier it is, the more kinetic energy it has.
Example 1
easyWhat is the kinetic energy of a 3 \text{ kg} ball moving at 8 \text{ m/s}?
Example 2
mediumA car doubles its speed from 15 \text{ m/s} to 30 \text{ m/s}. By what factor does its kinetic energy change?
Example 3
mediumA 0.5 \text{ kg} ball has 100 \text{ J} of kinetic energy. What is its speed?
Example 4
easyA 1200 \text{ kg} car doubles its speed from 15 \text{ m/s} to 30 \text{ m/s}. By what factor does its kinetic energy increase?