A stronger force can cause a ______ change in velocity.

forces do not change the velocity of an object

When two objects collide, both objects experience the same amount of force. How each object responds after the collision depends on what?

How much velocity each object has.

How much friction affects each car.

How much matter was lost in the collision.

Three chairs were rolling across a flat office floor. The blue and red chairs are the same mass, and they have more mass than the yellow chair. Each chair was hit by another chair, but not from the same direction. Use the information in the diagram to answer. Which chair(s) experienced the strongest force when hit? How do you know?

The blue and red chairs experienced the strongest force because they are both more massive than the yellow chair and they changed speed by the same amount.

The red chair experienced the strongest force because it is as massive as the blue chair and has the highest ending speed.

All three chairs experienced the same force because they changed speed by the same amount.

The blue chair experienced the strongest force because it takes more force to slow an object than it takes to make it go faster.

Scott and James work at a grocery store. After the grocery store closed, they were playing a game with a shopping cart and Scott’s skateboard. They crashed the skateboard and the shopping cart two times. The shopping cart had more mass in Crash 2 than it did in Crash 1. Use the information in the diagram to answer. In which crash did the skateboard experience a stronger force? Why?

Crash 2; the force on the cart was stronger in this crash, so the force on the skateboard was also stronger.

The skateboard did not experience a force; only the shopping cart experienced a force in the crashes.

The diagram doesn’t tell you anything about the force on the skateboard. It only gives information about the force on the shopping cart.

The skateboard experienced the same force in both crashes. The shopping cart changed speed by the same amount in each crash, so the force on the skateboard was the same each time.

What does this diagram tell us about the force applied to each bumper car passenger?

The force exerted on each passenger was the same.

The force exerted on each passenger was in the same direction.

The force exerted on the boy with a mass of 70 was weaker because he stopped.

The force exerted on the boy with a mass of 32 was stronger because he started moving.

Based on our investigations in class, which claim is better supported by evidence?

Claim 2: The thrusters only slowed the pod, it didn't stop; the pod hit the space station, which made it bounce and move in the opposite direction.

Claim 1: The thrusters caused the pod to move in the opposite direction.

Neither claim is supported by evidence.

What is wrong with this collision model?

The force arrows should be the same size or equal strength.

The velocity of the objects should be in the same direction.

The force arrows should be in the same direction and equal size.

Nothing is wrong with this collision model.

Force & Motion Amplify Review

Authored by Cassondra Rolland

Science

8th Grade

NGSS covered

Used 780+ times

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18 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is an example of HOW the motion of an object can change?

Slow Down

Thrusters

Mass

Velocity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When you push any object that is at rest how can the motion of that object change?

Slow down

Start moving

Remain at rest

Stop moving

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When you apply a strong force to an object in the same direction of its motion what will happen to the motion of the object?

Slow down

Change direction

Stop

Speed Up

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When you apply a strong force in the opposite direction to the motion of an already slow moving object what is the most likely change in motion?

Speed up in the same direction of its current motion.

Stop moving for a second and then begin to move again in the opposite direction.

The object will change directions and continue moving.

The object will not be affected by a strong force, only a weak force will make a difference.

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is a push or a pull that can change the motion of an object called?

Force

Friction

Velocity

Speed

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A force is required to change the _______ of an object.

velocity

mass

matter

color

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How an object changes velocity depends on the direction of the force exerted on that object.

True

False

Tags

NGSS.MS-PS2-2

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Force & Motion Amplify Review

Which of the following is an example of HOW the motion of an object can change?

When you push any object that is at rest how can the motion of that object change?

When you apply a strong force to an object in the same direction of its motion what will happen to the motion of the object?

When you apply a strong force in the opposite direction to the motion of an already slow moving object what is the most likely change in motion?

What is a push or a pull that can change the motion of an object called?

A force is required to change the _______ of an object.

How an object changes velocity depends on the direction of the force exerted on that object.

A stronger force can cause a ______ change in velocity.

When two objects collide, both objects experience the same amount of force. How each object responds after the collision depends on what?

When in a collision both objects receive an equal force strength but the forces are exerted in ______ directions.

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