Force and Motion Amplify Unit Review

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

• remain stationary.

• accelerate in the direction of the force.

• move at a constant speed in the direction of the force.

• accelerate in the opposite direction of the force

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

• Frictional forces oppose the motion of the car.

• The natural state of an object is to be at rest.

• Forward motion slowly runs out as energy is expended.

• Inertia acting on an object will dissipate.

Tags

NGSS.MS-PS3-5

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.

• a greater

• a weaker

• the same

Tags

NGSS.MS-PS2-2

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.

Speed in a particular direction

• force

• velocity

• motion

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.

• 
• 
• 
• 

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. 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.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

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

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

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

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

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

• The skateboard experienced THE SAME force in both crashes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2