Newton's 3rd law CFU

According to Newton's third law of motion, when one object exerts a force on a second object, the second object exerts a force of the same size but in which direction on the first object?

• In the same direction

• In the opposite direction

• In a random direction

• In no direction

Tags

NGSS.MS-PS2-1

Why don't the forces in a force pair cancel each other?

• Because they act on different objects

• Because they have different strengths

• Because they have different directions

• Because they have different masses

What is momentum?

• A measure of how hard it is to stop a moving object

• A measure of an object's mass

• A measure of an object's velocity

• A measure of an object's force

Tags

NGSS.HS-PS2-2

In a force pair, which force is the action force?

• The force applied by the object

• The force applied on the object

• Both forces are action forces

• Neither force is an action force

Tags

NGSS.MS-PS2-1

When a moving cue ball hits a stationary ball in a game of billiards, what happens to the momentum of the two balls?

• The momentum of the cue ball increases and the momentum of the other ball decreases

• The momentum of the cue ball decreases and the momentum of the other ball increases

• The momentum of both balls increases

• The momentum of both balls decreases

Tags

NGSS.HS-PS2-2

What is the law of conservation of momentum?

• The law that states that the total momentum of a group of objects stays the same unless outside forces act on the objects

• The law that states that momentum is always conserved in collisions

• The law that states that momentum is always conserved in elastic collisions

• The law that states that momentum is always conserved in inelastic collisions

Tags

NGSS.HS-PS2-2

In an elastic collision, what happens to the total momentum of the colliding objects?

• It increases

• It decreases

• It remains the same

• It depends on the mass of the objects

Tags

NGSS.HS-PS2-2

If a large truck and a car are moving at the same speed, which one is harder to stop?

• The truck

• The car

• Both are equally hard to stop

• It depends on their masses

Tags

NGSS.HS-PS2-1

When colliding objects bounce off each other, what type of collision occurs?

• Elastic collision

• Inelastic collision

• Perfectly elastic collision

• Perfectly inelastic collision

Tags

NGSS.HS-PS2-3

What is the direction of an object's momentum?

• In the same direction as its velocity

• In the opposite direction of its velocity

• In a random direction

• In no direction

Tags

NGSS.HS-PS2-2