Work Done And Power

Question 1

What is work done?

Answer 1

Is the force and distance moved by object because of the force
1J = 1Nm

Question 2

How do you work out efficiency?

Answer 2

Useful energy by device / total energy to device

Question 3

What is power?

Answer 3

Rate of energy transfer.

Power (W) =work done(J)/time taken(s)

P= ET

Question 4

How do you work out work down?

Answer 4

Word done = force x distance

E=Fxd