Physics Quiz - Forces and Motion

This illustration shows a box setting on a flat surface. You are viewing it from the side. In which direction would the box be moving?

• up

• down

• to the right

• to the left

Which of the following statements is true?

• Forces cause motion.

• Forces are needed to maintain motion in a frictionless environment.

• Forces are needed to change motion.

• Balanced force pairs cause acceleration.

Tags

NGSS.MS-PS2-2

In this situation, the force of gravity and the normal force are aligned at an angle of 180^o relative to each other.

• True

• False

A box is being pushes across the floor by two forces at the same time, as shown in the picture. You are viewing it from above. Which of the following best describes to motion of the box?

• As we view the picture, the box will move to the right and upward.

• As we view the picture, the box will move to the right and downward..

• As we view the picture, the box will move to the left and upward.

• As we view the picture, the box will move to the left and downward.

A student pushes against a classroom wall with an average force of 100 newtons 2.20 seconds. What is the average force with which the wall pushes back on the student?

• 100 N

• 220 N

• 52 N

• 2.20 N

Tags

NGSS.MS-PS2-1

What is the weight on the surface of Earth of an object of mass 15.00 kilograms? HINT: Gravity pulls down on a kilogram of mass with a force of 9.8 N.

• 15.0 N

• 98 N

• 147 N

• 212 N

The illustration below shows a 50-kilogram crate being moved across a frictionless horizontal surface by a 50-N horizontal force. What is the acceleration of the crate? HINT: Use Newton's 2nd Law F = ma

• 1.0 m/s²

• 10.0 m/s²

• 50.0 m/s²

• 100.0 m/s²

Tags

NGSS.MS-PS2-2

Which of the following vector diagrams best represents a cart slowing down as it travels to the right on a horizontal surface?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

A man ties a rope to a brick and holds it out at arm's length so that the brick is suspended 0.5 meters above the ground. Which of the free-body diagrams best represents this situation?

• F

• G

• H

• J

Tags

NGSS.MS-PS2-4

The diagram below shows a jet airplane in flight. A free-body diagram shows the vertical and horizontal

forces present on the jet. Which of the following best states the jet's vertical and horizontal motion?

• Vertical motion is 0 m/s. Horizontal motion is to the right.

• Vertical motion is upward. Horizontal motion is to the right.

• Vertical motion is upward. Horizontal motion is to the left.

• Vertical motion is downward. Horizontal motion is to the right.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4