P1.3 Energy and work

Question 1

How do you make a stationary object move?

Answer 1

By applying a force to the object.

Question 2

When a force moves an object, what is done on the object, and what is transferred to it?

Answer 2

Energy is transferred to the object and work is done on it

Question 3

What is equal to the work done in moving the object?

Answer 3

The energy supplied to the object is equal to the work done on it.

Question 4

What equation is used to calculate work done?

Answer 4

W = FS - Work done = force x distance moved in the direction of the force

Question 5

What are all the units in the equation, what is the unit of energy aswell?

Answer 5

Work done (Joules, J) Force (Newtons, N) s ( Metres, m)
Energy (Joules, J)

Question 6

If an object doesnt move when a force is applied how much work is done on the object?

Answer 6

No work is done on the object

Question 7

Define friction?

Answer 7

Friction is a force that opposes the motion of two surfaces in contact with each other

Question 8

Where is work done to overcome friction mainly transferred to?

Answer 8

It is trasnferred to thermal energy stores by heating