Middle School Unit 4 Quiz Review

What force causes a roller coaster to speed up after it goes down the first hill?

• Balanced Force

• Gravity

• Net Force

• Friction

What is the term used to indicate the highest point of a wave?

• amplitude

• trough

• crest

• frequency

How do we call the wave property that measures how many waves pass an object in a second?

• speed

• frequency

• amplitude

Kelly is riding her bike. She rides 10 meters in 20 seconds. What is her velocity?

• 2 meters per second

• 200 meters per second

• 0.5 meters per second

• 20 meters per second

• 100 N of force

• 220 N of force

• 55 N of force

• 120 N of force

It is easier to stop a train that is going slow than it is to stop a train that is going fast. This is an example of which law of motion?

• Newton’s third law of motion (action-reaction)

• Newton’s first law of motion (inertia)

• Newton’s second law of motion (force and acceleration)

Use the following story to answer the next two questions. Mario is driving at 60 mph. In order to pass a long truck he accelerates for 10 seconds. When he is finished accelerating, he is going at 80 mph. How did Mario’s acceleration affect his velocity?

• His velocity became faster (increased).

• His velocity became slower (decreased).

• His velocity did not change.

Use the following story to answer the next two questions. Mario is driving at 60 mph. In order to pass a long truck he accelerates for 10 seconds. When he is finished accelerating, he is going at 80 mph. 8. What was Mario’s acceleration? (acceleration = (final velocity – initial velocity) / time)

• 60 mph/s

• 10 mph/s

• 2 mph/s

• 20 mph/s

What is an example of force that is easy to see?

• The force that keeps you standing up.

• The force of gravity.

• When a baseball bat hits your head.

• When you open a door.

What is the formula to calculate acceleration?

• acceleration = (final velocity + beginning velocity) x time

• acceleration = (final velocity - beginning velocity) / time

• acceleration = (final velocity - beginning velocity) x time

• acceleration = (final velocity + beginning velocity) / time