Kinetic Energy: Mastery Test

Select the correct answer. Which equation correctly relates kinetic energy, mass, and velocity?

• KE = 1/2 mv

• KE = 1/2 mv^2

• KE = 1/2 mv

• KE = 1/2 mv^3

Select the correct answer. The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result?

• It decreases.

• It increases.

• It remains unchanged.

• It fluctuates up and down.

Select the correct answers. Which statements about braking a car are true?

• The greater the kinetic energy of a car, the longer it takes for the car to stop.

• The lower the kinetic energy of a car, the longer it takes for the car to stop.

• If the speed of a car doubles, the car’s kinetic energy and braking distance quadruple.

• If the speed of a car doubles, the car’s kinetic energy and braking distance remain the same.

Select the correct answer. Which of the following is an example of kinetic energy?

• a boy resting on a park bench

• a book sitting on a shelf

• a rubber band stretched as far as it can go

• a swing moving back and forth

Select the correct answer. Five race cars speed toward the finish line at the Jasper County Speedway. The table lists each car’s speed in meters/second. If each car has the same mass, which car will require the longest time to come to a full stop?

• Car A

• Car B

• Car C

• Car D

• Car E

Susan’s kinetic energy is greater than Hannah’s because:

• speed has a greater effect than mass

• mass has a greater effect than speed

• mass and speed have the same effect

• mass and speed don’t have any effect

A car, a bicycle, a bus, and a motorcycle are moving parallel to each other on a road. Each vehicle is traveling at the same speed. The bus will have the highest kinetic energy, while the bicycle will have the lowest kinetic energy.

• bicycle

• motorcycle

• train

• car

• bus