Forces and Motion Review

1. What is speed?

• distance something travels in a certain amount of time

• time of an objects arrival to a location

• GOOD!!! SPEED GOOD!!! GO FAST!

Tags

NGSS.4-PS3-1

2. What is the average speed of a boat that travels 600 meters in 40 seconds? (speed=distance/time)

• 640 mps

• 15 mps

• 24,000 mps

How much does displaced water weigh?

• 1/2 as much as the object displacing it

• Just as much as the object displacing it

• Twice as much as the object displacing it

• It will vary depending on the material the object is made of

A flight from New York to Los Angeles is 2000 miles. The trip takes 5 hours. Calculate the speed of the aircraft.(speed=distance/time)

• 4 hours

• 400 hours

• 10,000 miles

• 400mph

Tags

NGSS.MS-PS3-1

Suppose you are pushing a cart with a certain net force. Identify what happens to the cart’s acceleration when you push it with three times the net force?

• It stays the same

• It accelerates three times as much

• It accelerates six times as much

• It accelerates nine times as much

Tags

NGSS.MS-PS2-2

Determine which of the following has the most momentum.

• A motionless pickup truck

• A teacher riding a scooter down a ramp

• a mosquito flying at 1.0m/s

• A golf ball rolling at 1.5m/s

Tags

NGSS.MS-PS3-1

A downhill skier has her skis sharpened and waxed before every race. Infer what effect this would have on her performance?

• The force of friction between the skis and snow would increase, and her speed would decrease.

• The force of friction between the skis and snow would decrease, and her speed would decrease.

• The force of friction between the skis and snow would increase, and her speed would increase

• The force of friction between the skis and snow would decrease, and her speed would increase

Tags

NGSS.MS-PS3-5

Two children fight over a toy. One pulls with a force of 8N to the right. The other pulls with a force of 6N to the left. What is the strength and direction of the net force on the toy?

• 2N to the left

• 2N to the right

• 14N to the left

• 14N to the right

Tags

NGSS.MS-PS2-2

The acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. This example best illustrates what law?

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

• Newton's fourth law of motion

Tags

NGSS.MS-PS2-2

Which term describes resistance to change in motion?

• acceleration

• inertia

• net force

• velocity