Study Jams: Newton's 3rd Law of Motion

Every time your cat’s paw hits her toy string, it swings away from her. How does this demonstrate Newton’s third law of motion?

• Objects with mass, such as your cat's paw and toy string, will require inertia.

• Objects in action, such as a toy string, will experience force.

• For every action your cat makes, there is an equal and opposite reaction from the string.

Tags

NGSS.MS-PS2-1

What happens when two objects, such as a baeball and a bat, collide?

• They hit each other with the same force in opposite directions

• They hit each other with unequal force in opposite directions.

• They hit each other with unequal force in opposite directions.

Tags

NGSS.MS-PS2-1

What does an object do when it accelerates?

• It speeds up

• It moves in the opposite direction

• It changes direction

Answer explanation

Acceleration is the rate at which velocity changes

Velocity is the speed and direction of an object

Tags

NGSS.MS-PS2-2

When two objects with unequal mass collide, what will they do?

• accelerate at different rates

• accelerate in the same direction

• come to a complete stop

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A softball and a volleyball collide with equal speed, and then they accelerate at the same rate. What must be true about the masses of the objects?

• The softball has more mass than the volleyball.

• The softball and the volleyball have equal mass.t

• The volleyball has more mass than the softball.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

During PE class, your soccer ball collides with the goalie. What happens to the soccer ball?

• It stops moving completely.

• It accelerates more and in a different direction than the goalie.

• It accelerates at the same rate and in the same direction as the goalie.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What determines an object's mass?

• amount of gravity

• amount of friction

• amount of force