6.1.1.4 - Power

Question 1

How is power defined?

Answer 1

Power is defined as the rate at which energy is transferred or the rate at which work is done.

Question 2

What is the power equation?

Answer 2

Power = energy transferred OR work done ÷ time
Power in watts, W.
Energy transferred in joules, J.
Time in seconds, s.
Work done in joules, J.

Question 3

What is power? What does it means>

Answer 3

It is the rate which energy is transferred or the rate which work is done, per second. This means the higher the power of a device, the more energy it will transfer per second.

Question 4

What is happening when a force causes an object/body to move?

Answer 4

Work is being done on the object to by the force.

Question 5

Work is a measure of what?

Answer 5

Work is a measure of
the energy transfer when a force (F) moves an object through a distance (D).

Question 6

What is Energy Transferred (Joules, J) equal to?

Answer 6

It is equal to Work Done (Joules, J).

Question 7

What are the two factors that determine the amount of work done when a force acts on an object?

Answer 7

The size of the force acting upon the object.
The distance which the force causes the object/body to move in direction of the force.