Three boats were moving across the surface of a lake. The gray and pink boats are a greater mass than the orange boat. Each boat was bumped by another boat. Which boat experienced the strongest force when hit? How do you know?

The gray and pink boats because they are more massive, and all boats changed velocity by same amount.

The pink boat - it's as massive as the gray boat and has the highest ending speed.

All three - they all changed speed by the same amount.

The gray boat - it takes more force to slow down an object than it takes to make it go faster.

In which crash did the puck experience a stronger force?

Crash 2: The force of the purple paddle was stronger in this crash because it has more mass, so the force on the puck was stronger,

The puck didn't experience a force. Only the paddles experienced force.

The diagram doesn't tell you anything about the force on the puck.

The puck experienced the same force in both crashes.

In which crash did the test car experience a stronger force?

Crash 1: Force on garbage truck was stronger, so force on car was also stronger.

There is NO force on the car. In each crash, only the truck experienced force.

It was the same from both crashes. The trucks changed speed by the same amount in both crashes, so the force on the test car was the same both times.

The diagram doesn't tell you anything about the force on the test car. It only tells you about the force on the trucks.

In which crash did the skateboard experience the stronger force? Why?

Crash 2; the force on the cart was stronger in this crash.

The skateboard did not experience force, only the shopping cart did.

The diagram doesn't tell you anything about the force on the skateboard.

The skateboard experienced THE SAME force in both crashes.

In which crash does the satellite experience a stronger force?

Crash 1: The force exerted by the black asteroid would have been stronger in this crash, so the force on the satellite would also have been stronger.

It was the same force in both crashes.

The diagram doesn't tell you anything about the force on the satellite.

There is no force on the satellite.

In order for an object to start moving, the force must come from

the same direction as the object's motion

the opposite direction as the object's motion

In order for an object to stop moving, the force must come from

the opposite direction as the object's motion

the same direction as the object's motion

How does gravity pull?

Downward or toward center of gravity.

Upward toward the center of gravity

Ava pushed a chair and it slid across the carpet floor. The chair gradually slowed down and stopped after moving 10 meters. Why did the chair stop moving?

The floor exerted a force that is opposite to the direction of the chair’s motion.

The floor absorbs force from the chair.

All objects stop moving because their natural state is to be still.

How can you increase the acceleration of an object?

decrease the force applied to it

Energy can be classified into two main categories, kinetic energy and potential energy. Kinetic energy is when an object is:

objects do not have kinetic energy

What statement is true?

Mass never changes. Weight does.

Weight never changes. Mass does.

Both mass and weight change because they are affected by gravity.

Neither mass nor weight change. They are always the same.

If you have an empty box and then fill it with books, which statement is true about the box?

The mass and weight are directly proportional and both increase.

The mass increases and the weight decreases because they are indirectly proportional.

The weight increases but since mass doesn't change it stays the same.

Gravity pulls less on the box when it is full so it weighs less.

Amplify Force/Motion EOM Review 23-24

Authored by Kylan Holt

Science

8th Grade

NGSS covered

Used 186+ times

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MULTIPLE CHOICE QUESTION

a greater

a weaker

the same

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is NOT TRUE about friction:

Friction is a force that acts in the opposite direction of motion.

Friction slows objects down.

There is no friction on earth.

Friction on carpet is greater than friction on a bare floor.

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Amplify Force/Motion EOM Review 23-24

A student reads his paper on friction to the class. Which statement should he include in his paper if he wants to present accurate information?

If an unbalanced force acts on a stationary object, the object will...

If no force is being applied to a stationary object, the object will...

A brick is resting on a level, smooth surface. When a student applies a horizontal force of 5 N to the brick, the force of friction on the brick is also 5 N. Which statement BEST describes the effect of these two forces on the brick?

**Which statement best explains why a car that is rolling on a level surface will eventually come to a stop?**

Complete the sentence to match your observations: When you exert a stronger force on an object, you will see ________ change in velocity as compared to exerting a weaker force on the same object.

Which of the following is NOT TRUE about friction:

Speed in a particular direction

Which of the following pictures models Claim 1: The thrusters caused the pod to move in the opposite direction.

Which of the following models 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.

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