Which of these describes a force?

• a push or pull

• a liter or meter

• a graph or a photo

• a motion or direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two students on opposite sides of a box apply forces to the box. What must be true if the box doesn't accelerate?

• The forces are equal in strength and in opposite directions.

• One student must be pushing the box while another student pulls it.

• One student is applying a greater force.

• Both students are applying forces in the same direction.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When you are riding in a car and the car stops suddenly, you continue to move forward because of

• friction

• gravity

• inertia

• centripetal force

According to Newton's 2nd law of motion, an object's acceleration depends on the force applied to it and its

• velocity

• position

• length

• mass

Tags

NGSS.MS-PS2-2

A girl jumps forward off a boat. According to Newton's 3rd law of motion, what happens to the boat?

• the boat also moves forward

• the boat remains motionless

• the boat moves backward

• the boat moves backward and then forward

Tags

NGSS.MS-PS2-1

If two forces on an object at rest act in the same direction, what must be true about the motion of the object?

• the object must remain at rest

• the object must move at constant velocity

• the object must have different accelerations because of the two different forces

• the object must accelerate in the opposite direction of the forces

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a shopping cart is full in the grocery store, you have to push harder to get the cart to move. This is an example of

• Newton's 1st law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

• Newton's law of friction and gravity

Tags

NGSS.MS-PS2-2

Newton's 2nd law states that to increase acceleration you must

• increase the force

• decrease the force

• increase the mass

• increase inertia

Tags

NGSS.MS-PS2-2

What units are used to measure force?

• Newtons

• meters

• meters per second

• kilometers per second

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

____________ is a force that acts against moving objects.

• momentum

• friction

• velocity

• inertia