8.1 Unit Assessment Practice

Front

What force ultimately slows the roller coaster to a stop?

Back

Friction is the force that opposes motion and slows down the roller coaster.

Front

What can be concluded about the car's speed in the first 8 seconds based on the graph?

Back

The car is accelerating at a constant rate.

Front

If you double the speed of a moving object, what happens to its kinetic energy?

Back

Its kinetic energy quadruples.

Front

Which type of force resists motion?

Back

Friction resists motion.

Front

What is a good piece of evidence that energy was transferred when a stretched spring is released?

Back

The spring makes attached objects start moving.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion.

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with mass; if mass doubles, kinetic energy doubles.

Front

What is the effect of friction on moving objects?

Back

Friction slows down moving objects and can eventually bring them to a stop.

Front

What happens to an object's speed if it experiences a net force in the direction of motion?

Back

The object's speed increases.