Work/Power

Question 1

What is work measured in?

Answer 1

J (joules)

Question 2

What is power measured in?

Answer 2

W (watts)

Question 3

If the object is beneath the reference point what is the sign of the potential energy?

Answer 3

Negative

Height is negative in equation

Question 4

If the object is above the reference point what is the potential energy

Answer 4

Positive

Height is positive in equation

Question 5

When can you use the conservation of energy equation?

Answer 5

When the amount of energy put in equals the amount of energy taken out (no force applied, no force of friction) ex: a ball falling and only gravity working on it ( potential energy converted to kinetic energy but still no energy taken out)