(5) Work Done Flashcards
1
Q
What does it mean when a force does ‘work’?
A
The force causes an object to be displaced through a distance
2
Q
What’s the equation for work done?
A
Work done = force x distance
(Joules) (newtons) (Meters)
3
Q
What is the distance used when calculating work done?
A
The distance that is moved along the line of action of the force
4
Q
Under what circumstance is is 1 joule of work done?
A
When a force of 1 newton caused a displacement of 1 meter. 1 joule = 1 newton meter
5
Q
What happens when work is done against frictional forces?
A
- a rise is temperature
- kinetic energy is converted to heat
6
Q
Why does air resistance slow down a projectile?
A
- the object does work against he air resistance
- the kinetic energy is converted to heat, slowing down the object
