1
Q
What is power?
A
• The rate of energy transfer
2
Q
What are the equations for power?
A
• P = E/t
• P = W/t
3
Q
What are the units in the power equations?
A
• Power in W
• Energy in J
• Work done in J
• Time in s
4
Q
What is work done?
A
• Energy transferred when a force moves an object through a distance
5
Q
What is the equation for work done?
A
• W = Fs
6
Q
What are the units in the work done equation?
A
• Work done in J
• Force in N
• Distance in m
7
Q
What is a joule?
A
• The unit of energy
• 1 J = 1 N moving an object 1 m
8
Q
What is a watt?
A
• The unit of power
• 1 W = 1 J/s
9
Q
What happens to kinetic energy if speed doubles?
A
• It becomes 4 times bigger
10
Q
What happens to elastic potential energy if extension doubles?
A
• It becomes 4 times bigger
