Unit 4 & 5: Net Force, Force & Motion, Earth Science

If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Angela blows air into a balloon and holds the end of it closed with her fingers. When she lets go of the end of the balloon, Angela observes that the release of the air propels the balloon.  The propelling of the balloon from the release of the air is an example of which of Newton’s laws? 

• The force of an object is the product of its mass multiplied by its acceleration. 
•  A force of attraction exists between any two objects with mass. 
•  For every action, there is an equal and opposite reaction.
• An object in motion tends to stay in motion unless an unbalanced force acts upon it. 

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar
• Equal and opposite
• Equal and different
• Greater and opposite

When a bird flies, its wings push air downward. As a result the air pushes back upward on the bird. Which law of motion most applies to the way the wings of a bird beat? 

• Every action has an equal and opposite reaction
• The rate of acceleration of an object depends on the amount of force applied.
• Objects in motion tend to remain in motion until acted upon by an another force. 
• Force is defined by mass times acceleration

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound
• Gravitational

At which point is potential energy greatest?

• W
• X
• Y
• Z

At which point is kinetic energy greatest? 

• W
• X
• Y
• Z

When you compress a spring, you are storing __________ energy.

• sound

• elastic

• light

• chemical