Review Q #2

Look at the image. Which of the following best identifies and describes the force shown?

• The apple is being pulled toward the ground by gravity due to the strong gravitational force of Earth.

• The apple fell from the tree and toward the ground due to friction of the wind pushing past the apple.

• The apple is being pulled toward Earth due to the strong magnetic pull of Earth.

• The apple is being pushed toward Earth due to applied forces once it breaks free from the branch.

Tags

NGSS.MS-PS2-4

A metal paper clip lying still on a desk

is acted on by multiple forces. When a magnet is brought close

to the paper clip, it moves toward the magnet.

Select all options that identify and describe the forces

acting on the paper clip.

• Friction between the desk and paper clip causes it to stay still before the magnet acts upon it.

• Magnetic force between the paper clip and magnet causes the paper clip to be pulled toward the magnet without the need for contact.

• Normal contact force between the desk and paper clip before the paper clip is acted on by the magnet.

• Gravitational force pulls the paper clip down toward the Earth as it rests on the desk due to its great mass.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Choose all the examples that demonstrate the force of friction.

• A. A bike rolling down a hill.

• B. Rubbing hands together to keep warm.

• C. Air rushing over and around a car as it drives down the road.

• D. A pot resting on a silicone pad to absorb heat from cooking.

What can be said about the forces acting on the object?

• The forces are balanced.

• The forces are unbalanced.

• The system is stable.

• The system is unstable.

Tags

NGSS.MS-PS2-2

What is the net force

• 80 N

• 20 N

• 180 N

• 120 N

Tags

NGSS.MS-PS2-2

According to Newton's Third Law, what happens when a swimmer pushes against the pool wall to propel themselves forward?

• The wall pushes back against the swimmer with the same amount of force.

• The wall pushes back against the swimmer with twice as much force.

• The wall pushes back against the swimmer with half as much force.

• The wall does not push back against the swimmer; the force of the swimmer's push is what propels them forward.

Tags

NGSS.MS-PS2-1

Which option accurately completes the following statement? The gravitational potential energy of an object on Earth increases with the ___ of an object and the ___ of the object relative to Earth.

• gravity; mass

• zero gravity; height

• mass; gravity

• mass; height

The gravitational potential energy of the roller coaster car reaches its greatest value at (a)   and its smallest value at (b)   .

• point A
• point C
• point E

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

At what point will the roller coaster car have TRANSFORMED the greatest amount of gravitational potential energy into kinetic energy?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Match the following

• planets in the solar system

• friction

• textbook sitting on a desk

• magnetism

• pushing a textbook across a desk

• applied force

• refrigerator magnet

• gravity

• textbook sliding across the desk

• normal force

Tags

NGSS.MS-PS2-4