SP2c Power and doing work Flashcards
1
Q
Joule (J) is equivalent to?
A
a newton metre (Nm)
2
Q
Work done is?
A
energy transferred when a force moves an object through a distance, in the direction of the force.
3
Q
If the force is in the same direction as the motion?
A
force does work on the object and the object will speed up.
4
Q
If the force is in the opposite direction to the motion?
A
the object does work and it will slow down (unless other forces act).
5
Q
What happens when work is done?
A
one energy store will decrease and another will increase.
6
Q
Power is?
A
the rate of energy transfer or the energy transferred per second.
7
Q
Power gives an indication as to how?
A
quickly something is storing (or using up its store of) energy.
8
Q
A watt is equivalent to ?
A
a joule per second (J/s)
