Amplify Force and Motion Unit Review

Alice and Kai were playing air hockey, which is a game where players hit a puck with paddles so the puck slides across a table. After the game, they were crashing the puck and two different paddles. The puck was the same in both crashes, but the paddles were different: the red paddle had less mass, while the purple paddle had more mass. Use the information from the diagram to answer.

In which crash did the puck experience a stronger force?

• The puck didn't experience a force. Only the paddles experienced 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 diagram doesn't tell you anything about the force on the puck.

• The puck experienced the same force in both crashes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Scientists are modeling different ways a satellite and an asteroid might crash into each other. They used the same satellite in both crashes, but two different asteroids—a black one with more mass for Crash 1 and a gray one with less mass for Crash 2. Use the information from the diagram to answer.

In which crash does the satellite experience a stronger force?

• It was the same force in both crashes.

• 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.

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

• There is no force on the satellite.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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. Use the information from the diagram to answer. Which boat experienced the strongest force when hit?

• 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.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Alfonso, Julia, and Margie were having fun as they rolled some office chairs across a flat floor. All three chairs have the same mass. Margie gave each of the chairs a push, but not all from the same direction. Each chair changed speed as a result of being pushed. Use the information from the diagram to answer.

Which chair(s) experienced the strongest force when it was pushed? How do you know?

• The black chair experienced the strongest force because it takes a stronger force to slow something down than it takes to speed something up.

• The blue chair experienced the strongest force because it had the fastest ending speed.

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

• The pink and blue chairs experienced the strongest forces because they both gained the same force as they sped up. The black chair lost force, so it slowed down.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In soccer, players kick a soccer ball across a flat field. At practice one day, three soccer balls that have the same mass were rolling across the field. They were each kicked by a soccer player, but not from the same direction. Each soccer ball changed speed as a result of being kicked. Use the information in the diagram to answer.

Which soccer ball(s) experienced the strongest force when it was kicked? How do you know?

• The purple soccer ball because it has the fastest ending speed.

• The blue soccer ball because it takes a stronger force to slow something down than to speed something up.

• The blue soccer ball because it changed speed the most.

• The purple and yellow soccer balls because they gained force, while the blue soccer ball lost force.

Tags

NGSS.MS-PS2-2

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.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2