Forces and Motion Unit Review

Zach pushes his little brother on a sled through the snow. Then, he tries to push his father (who has more mass) on the same sled. He notices that he has to use a lot more force to move his father. This best represents an example of which of Newton's laws?

• 1st Law (Inertia)

• 2nd Law (F = ma)

• 3rd Law (Action-Reaction)

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The weight of an object is caused by the force of ____________ acting on it.

In the metric system (SI), weight is measured in

• grams.

• kilograms.

• newtons.

• ounces.

To calculate the speed of an object, you must divide distance by ____________.

Hunter's bike remains stopped at the intersection until his feet apply a force to the pedals to make it start moving again. This best represents which of Newton's laws?

• 1st Law (Inertia)

• 2nd Law (F = ma)

• 3d Law (Action-Reaction)

Erin rides her bike from point A to point B and continues to point C. What is the total distance she travels?

• 7 meters

• 5 meters

• 4 meters

• 3 meters

Erin rides her bike from point A to point B and continues to point C. What is her displacement?

• 7 meters

• 5 meters

• 4 meters

• 3 meters

A plane is traveling 600 km/h in a straight line. This plane is accelerating. True or False?

• True

• False

Tags

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Hailey dives across the court to save the volleyball. The force of ___________ is opposing her motion and makes her slow down and eventually stop sliding.

Oh, no! I hope he makes it to the dock. When this man jumps out of a boat that is not tied to anything, he pushes on the boat and the boat pushes on him as it moves backwards. This best represents which of Newton's laws?

• 1st Law (Inertia)

• 2nd Law (F=ma)

• 3rd Law (Action-Reaction)

Tags

NGSS.MS-PS2-1