Motion Review

The mini skateboards push each other with the same force in opposite directions, BUT the skateboard with weights on it goes back less. Which two laws explain this motion? (check two boxes)

• Newton's First Law of Motion (Inertia)

• Newton's Second Law of Motion (F=ma)

• Newton's Third Law of Motion (Action/Reaction)

_______ force is needed to move objects of larger mass.

• Less
• Equal
• More
• Light

When you push on a wall, the wall pushes back on you with _____force.

• not enough

• more

• no

• equal

When a heavy football player and a light one run into each other, who exerts more force?

• The heavy one
• The light one
• They are equal
• There is no such thing as force 

During an investigation on energy, Seth rolls marbles of four different masses down a ramp. Which size marble will have the greatest kinetic energy when it reaches the bottom of the ramp?

• 2g

• 3g

• 5g

• 6g

When a rocket is launching, the engine produces hot exhaust gases which flows out of the back of the engine. In turn, a thrusting force is produced in the opposite direction causing the rocket to take off. Which law explains this motion?

• Newton's First Law of Motion (Inertia)

• Newton's Second Law of Motion (F=ma)

• Newton's Third Law of Motion (Action/Reaction)

Objects with larger _____ also have greater inertia.

• inertia

• energy

• mass

• weightlessness

Sir Issac Newton discovered how many laws of motion?

• 1

• 2

• 3

• a billion

A child is pulling a sled and stops. The sled kept moving and hit the child.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

A still object __________ have forces acting upon it.

• does
• can't
• doesn't
• will sometimes