HS Unit 4 Motion & Forces Practice Test

A brick mason builds a simple machine to lift bricks from the ground up to the second story of a building. The machine requires an input force of 35 N to lift 75 kg (735 N) of bricks. What is the ideal mechanical advantage (MA) of the simple machine?

• MA = 0.048

• MA = 2.143

• MA = 35

• MA = 21

Tags

NGSS.HS-PS2-4

Student A and student B are pushing a box towards the right by applying force as shown. At the same time, student Y and student Z are pushing the box with the force shown, but in the opposite direction. Student A and student B state that the box will move in the direction of the force that they applied, while student Y and student Z state that the box will move in the direction that they applied the force. Which claim is valid?

• The net force on the box is 7N and the box will move to the left.

• The net force on the box is 4N and the box will move to the right.

• The net force on the box is 11N and the box will move in the direction of the greater force.

• The net force on the box is 8N and the box will move in the direction of the lesser force.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Two balls of different masses are dropped from a building, and they hit the ground at the same time. How does the force of gravity, exerted on each ball, depend on its mass?

• It is independent of the ball's mass.

• It is directly proportional to the ball's mass.

• It is inversely proportional to the ball's mass.

• It is directly proportional to the ball's mass squared.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m. Assuming that the ramp is frictionless, what is the ideal mechanical advantage of the ramp and does the pulley provide any additional advantage?

• The ideal mechanical advantage of the ramp is 0.4, and the pulley makes it easier to pull the block up the ramp.

• The mechanical advantage of the ramp is 2.5, and the pulley does not provide any additional mechanical advantage.

• The mechanical advantage of the ramp is 10, and the pulley does not provide any additional mechanical advantage.

• The mechanical advantage of the ramp is 40, and the pulley does provide an additional mechanical advantage.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-ETS1-1

Mary and Dianne are ice skating. They push their hands together as shown. Which law supports the claim that Mary and Dianne’s feet will move farther apart?

• Newton’s second law – because a force will cause a change in the velocity of an object.

• Newton’s third law – because for every action there’s an equal and opposite reaction.

• Newton’s first law – because objects at rest tend to stay at rest until an outside force acts upon them.

• Newton’s law of universal gravitation – because the attraction between two bodies is inversely related to the distance between them.

Tags

NGSS.MS-PS2-1

What is the difference between speed and velocity?

• Velocity includes an object's direction, and speed does not.

• Speed includes an object's direction, and velocity does not.

• Velocity is always greater than zero, but speed can be greater or less than zero.

• Speed is always greater than zero, but velocity can be greater or less than zero.

Tags

NGSS.MS-PS3-1

A soccer ball and a car are dropped from the same height in a vacuum on Earth. Choose the two statements that are correct.

• The soccer ball will take less time to reach the ground than the car.

• The car will take less time to reach the ground than the soccer ball.

• The soccer ball and the car experience the same gravitational force.

• The gravitational force each object experiences is dependent on mass.

• The soccer ball and the car experience the same acceleration due to gravity.

Tags

NGSS.MS-PS2-4

The table shows the acceleration due to gravity on four different planets. What planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N?

• Mars

• Mercury

• Venus

• Earth

Tags

NGSS.MS-PS2-4

Which pair of graphs represents the same motion of an object?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

How is mass different than weight?

• Weight is the amount of matter, and mass is the amount of matter plus gravity.

• Mass is the amount of matter, and weight is the amount of matter plus gravity.

• Mass is the amount of matter, and weight is the amount of matter plus energy.

• Weight is the amount of matter, and mass is the amount of matter plus energy.

Tags

NGSS.MS-PS2-4