Work

1
Work

• A force that causes a displacement of an object
  does work on an object
• Work is done only when components of the force
  are parallel to the displacement
• WFd
• WnetFnetd(cos?)

2
Kinetic Energy

• The energy associated with an object in motion
• KE ½ mv2
• So Wnet1/2mv2f-1/2mv2i
• Kinetic Energy depends on an objects speed and
  its mass