Force & Motion Review

Ruben slides a book across the floor. Eventually, the book will stop moving. What force causes the book to come to rest?

• friction

• gravity

• magnetism

• push

Tags

NGSS.MS-PS2-2

Valerie has an object that attracts objects made of iron or steel. What force does this object use to attract the objects?

• push

• gravity

• friction

• magnetism

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A boy pulls upward on a box but cannot lift it. Which is the best explanation of why the boy cannot lift the box?

• the boy has more mass than the box

• gravity is stronger than the force he can lift with

• air is pushing down on the box

• there is too much friction on the bottom of the box

Tags

NGSS.MS-PS2-4

Amanda pushes a toy car to set it in motion. She determines the speed by measuring how far the car goes in 15 seconds. Which of these is most likely to increase the speed of the car?

• push the car up a ramp

• push with greater force

• use a car with greater friction

• use a car with more mass

Tags

NGSS.MS-PS2-2

A rock is balanced on the side of a grassy hill. A gentle push causes the rock to start rolling down the hill. What happens if the rock is pushed with more force?

• it stays in place

• it gains more friction

• its speed increases

• its mass decreases

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Margie is bringing a box filled with books to her garage. She has to push very hard to move the box. Why is the box difficult to move?

• the books have a little mass, so not much force is required

• the box has a little friction, so a large force is required

• the books have a lot of mass, so a large force is required

• the box has a lot of friction, so not much force is required

Tags

NGSS.MS-PS2-2

Charlie hits two different golf balls with the same force. Which golf ball will go farthest?

• the ball with the smaller mass

• the ball with the greater mass

• the ball with the greater friction

• the ball with the smaller diameter

Tags

NGSS.MS-PS2-2

Rob puts his dog in a wagon and pulls him around the block. What happens if he pulls a heavier dog with the same force?

• the wagon will not move as fast

• the heavier dog will create less friction

• the wheels on the wagon will turn more quickly

• the heavier dog will be easier to pull

Tags

NGSS.MS-PS2-2

Luis and Dan are both pushing on opposite sides of a box. The box is not moving. What must be true about the forces?

• Luis is using more force

• Dan is using more force

• Luis's and Dan's forces are balanced

• Luis is pushing against gravity but Dan is not

Tags

NGSS.MS-PS2-2

The two teams are pulling the rope in opposite directions, but the flag in the center is not moving. Why does the flag stay in the same spot?

• there is too much friction

• the team on the right is pulling harder

• the force of gravity is not strong enough

• the teams are pulling with the same force

Tags

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