CAST Crash Course: Motion in Action

A box is sitting still on the floor. What must be true about the forces acting on it?

• The forces are balanced

• Gravity is not acting on it

• It has no mass

• It is accelerating

Tags

NGSS.MS-PS2-2

Which situation describes unbalanced forces?

• A skateboard speeding up down a ramp

• A rock resting on the ground

• A book staying still on a shelf

• A car stopped at a red light

Tags

NGSS.MS-PS2-2

An object in motion stays in motion unless acted on by a force. This is an example of:

• Newton’s 2nd Law

• Law of Conservation of Energy

• Newton’s 3rd Law

• Newton’s 1st Law

What happens when net force increases on an object?

• Gravity stops working

• Mass increases

• The object accelerates more

• The object slows down

Tags

NGSS.MS-PS2-2

At what point on a roller coaster does the car have the most potential energy?

• Bottom of the hill

• Right after the loop

• While it's moving

• At the top of the highest hill

Tags

NGSS.MS-PS3-2

Which best describes kinetic energy?

• Energy stored in an object

• Energy not moving

• Energy of motion

• Energy that disappears

What does mass measure?

• How much space something takes up

• How hot something is

• How fast something moves

• How much matter is in an object

What type of energy is stored in a stretched rubber band?

• Light energy

• Kinetic energy

• Thermal energy

• Potential energy

Tags

NGSS.MS-PS3-2

Which is an example of Newton's Third Law?

• A car speeds up

• A book stays on a shelf

• A balloon flies as air rushes out

• An apple falls

Tags

NGSS.MS-PS2-1

What is friction?

• A force that speeds up motion

• A push from the air

• A force that opposes motion

• A type of magnetism