Energy, Work, Power

Work happens when what occurs?

• you apply force over a certain distance

• a force is applied to an object

• the inertia of an object is unchanged

What is the equation for work?

• W= F x d
• W = F x t
• W = t X d
• W= F

What units do we measure work in?

• meters
• kilograms
• joules
• newtons

Energy is the ability

• to change enregy
• to stop work
• to do work
• to apply force<br />

What is the energy of motion?

• elastic potential energy
• kinetic energy
• gravitational potential energy

Which equation is for kinetic energy

• KE= 1/2mv
• KE=1/2mv2
• KE=mgh
• KE=F X d

What is potential energy

• stored energy that could potentially be used to perform work
• energy of motion
• the energy an object has due to velocity<br />

What formula will give us gravitational potential energy

• GPE=mgh
• GPE=KE
• GPE=1/2mv2
• GPE=wgh

When work is doen on a system, what changes?

• inertia
• energy
• momentum
• acceleration

Which of the following will cause systems to "lose" energy?

• friction
• momentum
• velocity
• acceleration