Study Jams: Newton's Third Law of Motion

What is Newton's Third Law?

• Force = mass x acceleration

• Objects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted on by an outside, unbalanced force.

• For every action there is an equal and opposite reaction.

True or false:  The two people hit into each other with the same amount of force.

• True

• False

What does an object do when it accelerates?

• Speeds up

• Moves in opposite direction

• Changes speed and direction

• all of the above

Why is the young man standing after they both collided?

• He has less mass so he accelerated more.  

• He has more mass so he accelerated less.  

What determines an objects mass?

• Amount of matter

• Amount of friction

• Amount of force

• Amount of gravity

The bat and ball hit each other with ______.

• different force

• the same force, but in different directions

Why did the baseball go flying but the bat did not?

• the ball has more mass

• the ball has less mass

When two objects with UNEQUAL mass collide, that will they do?

• accelerate at different rates

• accelerate at the same rate

• come to a complete stop

• continue at the same velocity (speed)

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 volleyball have equal mass

• The volleyball has more mass than the softball

• It is impossible to compare the mass of the softball and volleyball

According to Newton's third law, when objects collide, they press against each other with ____________ force in ______________ directions.

• unequal; opposite

• equal; the same 

• unequal force; the same

• equal; opposite