1.1-1.6

What is the equation for work?

• Work = force x distance

• Work = force / distance

• Work = joule

• work = force x distance^2

The previous equation only works when force is?

• Increasing

• Decreasing

• Constant

• Proportional

Whats an example of force against another force?

• When your waist pushes against the elastic in your pants.

• When you roll a ball

• When you drop a plate

• When you throw a football

Work done to change the speed of an object?

• A ball rolling down the hill

• The engine in a go-cart

• The wind pushing on a sail boat

• A ball dropping

A mega-watt equals how many watts?

• 1,000

• 100

• 1,000,000

• 10

Horse power is equivalent to what percentage of kilowatts?

• 10%

• 100%

• 75%

• 50%

What is one of the equations for gravitational energy?

• Weight x height

• mass x height

• weight x acceleration

• mass x acceleration

Out of the examples what are potential chemical energy?

• electric batteries

• a bow drawn back

• a stretched rubber band

• a compressed spring

What is an examples of potential gravitational energy?

• food

• an outlet

• water in a reservoir

• a propeller

If you lift weights twice as high you must also?

• Work twice as hard

• its a

• its a

• its a