Changes in Motion and Force Unit Review

You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. Your body seems to be pushed back against the seat. Which word best explains why your body seemed to be pushed backward against the seat?

• newton

• vector

• inertia

• gravity

Tags

NGSS.MS-PS2-1

Inertia is a property of matter that __________ changes in motion.

• accelerates

• decelerates

• resists

• stabilizes

Brad and Erin decide to have a tug of war contest. Erin pulls the rope with all her might and so does Brad. Sadly, Brad only pulls with half the force that Erin pulls with. Which way will the rope move?

• Towards Erin, since the forces are balanced.

• Towards Brad, since the forces are balanced.

• Towards Erin, since the forces are unbalanced.

• Towards Brad, since the forces are unbalanced.

Tags

NGSS.MS-PS2-2

James is trying to prove Newton's 2nd law of motion. He tries to move four different objects with different masses, shapes, and sizes from point A to point B. The objects are a toy car, a car, a refrigerator, and a kitchen table. After some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. The object that takes the most force to move is the

• Car

• Table

• Toy car

• Refrigerator

Tags

NGSS.MS-PS2-2

A 600g basketball, a 500g football, a 150g baseball, and a 50g yo-yo: four toys. If you had to throw one of the four, which one would take the MOST force to throw?

• baseball

• basketball

• football

• yo-yo

Tags

NGSS.MS-PS2-2

Sam is pushing a cart. How can he make the cart move faster?

• He can add weight to the cart.

• He can push the cart up a ramp.

• He can take the wheels off the cart.

• He can increase the force of his push.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Which example best represents an object with balanced forces acting upon it?

• A boat moving through the water.

• A book sitting on a high shelf.

• A wagon rolling down a steep hill.

• A baseball thrown in the air.

Tags

NGSS.3-PS2-1

Liz puts a 1 kg weight and a 10 kg weight on identical sleds. She then applies a 10N force to each sled. Describe why the smaller weight has a larger acceleration.

• The same amount force is applied to both sleds.

• The acceleration is directly proportional to the force.

• It indicates the extent of the unbalanced forces present.

• Acceleration depends indirectly on the mass of the object.

Tags

NGSS.MS-PS2-2

The law of inertia states that an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an unbalanced force. Which law of motion is this describing?

• Newton's First Law

• Newton's Third Law

• The law of gravity

• Newton's Second Law

A ball is rolling straight across the floor until Bradley kicks it.

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2