Work and Energy

What are the units of force?

• Joules (J)

• Watts (W)

• Newtons (N)

• Meters (m)

What are the units of work?

• Joules (J)

• Watts (W)

• Newtons (N)

• Meters (m)

What are the units of power?

• Joules (J)

• Watts (W)

• Newtons (N)

• Meters (m)

 $f\cdot\ d\ \rightarrow$  
force times distance equals what?

• Power

• Work

• Mechanical Advantage

• Forces

 $\frac{work}{time}\ \rightarrow$  
work divided by time equals what?

• Power

• Work

• Mechanical Advantage

• Forces

 $\frac{output\ force}{input\ force}\ \rightarrow\ \frac{input\ dist.}{output\ dist.}\ \rightarrow$  
output force divided by input force OR
input distance divided by output distance equals what?

• Power

• Work

• Mechanical Advantage 

• Percent Effeicency 

the transfer of energy to a body by the application of a force that causes the body  to move in the direction of the force

• Power

• Work

• Mechanical Advantage

• Forces

a quantity that measures the rate at which work is done or energy is transformed

• Power

• Work

• Mechanical Advantage

• Forces

a quantity that measures how much a machine multiplies force or distance

• Power

• Work

• Mechanical Advantage

• Forces

one of the six basic types of machines, which are the basis for all other forms of machines

• simple machines

• compound machines

• mechanical advantages

• mechanical disadvantage