Unit 1 Motion & Forces Review

A car is traveling at a constant velocity of 60 km/h east for 4 hours. Choose the correct statement about the acceleration of the car.

• The acceleration of this car is zero.

• The acceleration of this car is positive.

• The acceleration of this car is negative.

• The acceleration of this car is 15 m/s.

Two classes are having a Tug-of-War contest. Class A is pulling with 1,250 N of force. Class B is pulling with 1,249 N of force. Which class will win?

• Class A

• Class B

• Tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force

• The attractive force that exists between all objects with mass

Tags

NGSS.MS-PS2-2

A basketball rolls to a stop along a gym floor without anyone touching it. What answer choice BEST explains why this occurred?

• The initial force that started the ball ran out

• The opposing force of friction stopped the ball.

• The natural state of the ball is not to be in motion.

• The force of gravity slowed the ball until it stopped.

Tags

NGSS.MS-PS2-2

You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. Your body seems to be pushed back against the seat. Which word best explains why your body seemed to be pushed backward against the seat?

• newton

• vector

• inertia

• gravity

Tags

NGSS.MS-PS2-2

A rock is whirled around in a circle with a slingshot. As the rock leaves the slingshot, it has an instantaneous velocity in a straight line. How do Newton's laws of motion explain this?

• Gravity does not exert a force on the rock until it leaves the slingshot.

• Once the slingshot is not exerting a force on the rock it will slow down and stop.

• Air resistance keeps the rock from moving in a circle after it leaves the slingshot.

• To move in a circle requires an acceleration and therefore a net force. This force is supplied by the slingshot.

Tags

NGSS.HS-PS2-1

Which would best be explained using Newton's Third Law?

• A gun moves backward while firing a bullet.

• A bicyclist coasts down from the top of a hill.

• A car stops short and the passenger moves forward.

• A larger engine allows a car to accelerate faster.

Tags

NGSS.MS-PS2-1

A girls walks 4 steps forward and then 3 steps backward. The girls distance walked is _________ steps and her displacement is ____________ steps.

• 1, 7

• 3, 4

• 7, 1

• 7, 7

Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10 m/s around the track. Which statement can be made about the pony's acceleration?

• The pony is decelerating.

• The rate of acceleration varies.

• The pony is accelerating around the track.

• The pony is not accelerating around the track.

Tags

NGSS.HS-PS2-1

What is the velocity in meters per second of a runner who runs exactly 110 m toward the beach in 72 seconds.

• 0.654 m/s toward the beach

• 1.53 m/s toward the beach

• 15.3 m/s toward the beach

• 7920 m/s toward the beach

Tags

NGSS.MS-PS3-1

A 5.5 kg box is pushed across the lunch table. The acceleration of the box is 4.2 m/s2. What was the net force applied to the box?

• 1.3 N

• 1.31 N

• 9.7 N

• 23.1 N

Tags

NGSS.MS-PS2-2