Forces Review

Taryn is playing with a bouncy ball. She notices that the ball seems to travel faster on its way back toward the ground than on its way up into the sky. Why would the ball go slower moving away from the ground?

• because the ball must move against the force of Earth's gravitational field on the way up

• because the ball must move against the force of Earth's magnetic field on the way up

• because the ball moves with the friction force of air molecules on the way down

• because the ball moves with the elastic force of air molecules on the way down

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Kevin places a book on a desk. Why does the book stay still on the desk?

• There are no upward forces on the book.

• There are no downward forces on the book.

• The forces acting on the book are balanced.

• The forces acting on the book are unbalanced.

Which of the following explains why an apple would fall from a tree?

• the gravitational attraction between the apple and Earth

• the kinetic attraction between the apple and Earth

• the potential attraction between the apple and Earth

• the weak attraction between the apple and Earth

Tags

NGSS.MS-PS2-4

A teacher is demonstrating acceleration to his class by throwing two balls. He throws both balls using the same amount of force in the same direction. The first ball he throws has a mass of 0.1 kg and the second ball has a mass of 0.5 kg. Which statement BEST compares and describes the likely results of the demonstration?

• The first ball has a smaller mass, so it will have less acceleration than the second ball.

• The first ball has a smaller mass, so it will have greater acceleration than the second ball.

• The balls will have equal acceleration because they are being thrown in the same direction.

• The balls will have equal acceleration because they are being thrown with the same force.

Tags

NGSS.MS-PS2-2

Which argument is supported by the results of the investigation?

• The acceleration of an object is proportional to the mass of the object but not the force applied to it.

• The acceleration of an object is proportional to the force applied to the object but not the mass of it.

• The acceleration of an object is proportional to both the mass of the object and the force applied to it.

• The acceleration of an object is neither proportional to the force applied to the object nor the mass of it.

Tags

NGSS.MS-PS2-2

A little girl pushes her toy car along the concrete sidewalk. Eventually, the toy car slows down and comes to a stop. What force played the greatest role in causing the toy car to slow down and stop?

• frictional force

• gravitational force

• the force from the girl's push

• the normal force from the ground

Tags

NGSS.MS-PS2-2

If the force of each team is balanced by the other, then

• both teams will fall to the ground.

• both teams will move to the right.

• both teams will move to the left.

• both teams will remain in place.

Which of the following describes what will happen when the ball hits the seesaw?

• The box will move up against gravity

• The box will stay in the same position.

• The box will slide off the seesaw.

• The box will move closer to the ground.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which answer choice best explains why tractor trailers take more time to speed up and slow down than regular cars?

• Tractor trailers have less mass and require less force to move.

• Tractor trailers have more mass and require more force to move.

• Tractor trailers have less mass and require more force to move.

• Tractor trailers have more mass and require less force to move.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What do you call a push or pull on an object?

• Chemical

• Force

• Magnet

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1