Force Concept Review

1. A person is riding in an elevator that is moving downwards at a constant rate. Which of the following is true regarding the forces acting ON THE PERSON?

• The upwards normal force is greater than the downwards force of gravity

• The downwards force of gravity is greater than the upwards normal force

• The upwards normal force is equal to the downwards force of gravity

• The upwards normal force is equal to the downward force of gravity plus the downwards force of air pressure

• There are no forces acting on the person because it isn’t changing its motion.

Tags

NGSS.HS-PS2-1

A monkey is swinging on a vine in the direction denoted with the dotted line. In which directions are there forces acting on the monkey? SELECT ALL THAT APPLY.

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS2-1

A car is driving along at 30 m/s when SPLAT! A bug runs into the windshield. Which of the following is true about the forces experienced by the objects?

• The force on the bug is larger than the force on the windshield

• The force on the windshield is larger than the force on the bug

• The force on the windshield is equal to the force on the bug

• There is no force on the windshield, only a force on the bug because only the bug changes its motion.

• There is no force on the bug, only a force on the windshield because the bug ran into it

Tags

NGSS.HS-PS2-1

A rocket powered sled is moving along the ground at a constant speed when suddenly the force exerted on the sled by the rocket is tripled. Describe the motion of the sled (Disregard the effects of air resistance)

• The sled will slowly speed up until it reaches a faster constant speed

• The sled will immediately begin moving at three times the original speed

• The sled will immediately begin moving at a faster speed, but less than three times the original speed

• The sled will continue speeding up until a new force is introduced

Tags

NGSS.HS-PS2-1

A rocket powered sled is moving along the ground at a constant speed when suddenly the rocket is turned off. Describe the motion of the sled (Disregard the effects of air resistance)

• a. The sled will immediately stop

• b. The sled will immediately begin slowing down

• c. The sled will continue moving at a constant speed

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

As viewed from above, a hover craft is sliding upwards across a frictionless surface. At point P, the fan on the craft turns on, pushing the hover craft to the left at a constant speed. At point Z, this fan is turned off. Which of the following diagrams represents the motion of the craft after point P and before point Z?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS2-1

1. A heavy ball and a light ball each of equal size and shape are dropped from the ceiling of the atrium. Which of the following statements describes the time that it takes the two balls to reach the ground?

• a. The time that it takes for the light ball to hit will be roughly double the time that it takes for the heavy ball to hit the ground

• b. The time that it takes for the heavy ball to hit will be roughly double the time that it takes for the light ball to hit the ground

• c. The time that it takes for the heavy ball to hit the ground will be about equal to the time that it takes the light ball to hit the ground.

• d. The time that it takes for the light ball to hit the ground will be more than but less than double the time that it takes for the heavy ball to hit the ground

• e. The time that it takes for the heavy ball to hit the ground will be more than but less than double the time that it takes for the light ball to hit the ground

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A box pusher is pushing a box to the right along the floor at a constant rate of 2 m/s. Which of the following statements is true regarding the forces on the box?

• a. The rightwards force from the man is double the leftwards force of friction

• b. The leftwards force of friction is double the rightwards force from the man

• c. The rightwards force from the man is equal to the leftwards force of friction

• d. The rightwards force from the man is greater than but less than double the leftwards force of friction

• e. The leftwards force of friction is greater than but less than double the rightwards force from the man

Tags

NGSS.HS-PS2-1

1. Two blocks, one with a mass of 5 kg and the other with a mass of 10 kg slide off of a table at equal speeds. Which of the following statements is true about the horizontal distance traveled by the blocks after they leave the table and before they hit the ground?

• a. The heavy block will travel double the horizontal distance of the light block

• b. The light block will travel double the horizontal distance of the heavy block

• c. The heavy block will travel the same horizontal distance as the light block

• d. The heavy block will travel a greater horizontal distance but less than double the horizontal distance of the light block

• e. The light block will travel a greater horizontal distance but less than double the horizontal distance of the heavy block

Tags

NGSS.MS-PS3-1

Two students are standing on frictionless ice. 60 kg student A pushes off of 100 kg student B.

• a. The force on student A is larger than the force on student B

• b. The force on student B is larger than the force on student A

• c. The force on student B is equal to the force on student A

• d. There is no force on student A, only a force on student B

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2