power Flashcards
1
Q
what is power
A
power is the rate of doing work
2
Q
what is the formulae of power
A
work done/time
mxaxd/t
3
Q
what is the unit of power
A
joules
4
Q
does energy ever change?
A
energy always stays the same but if there is an increase of power the work will be done in a shorter time
5
Q
how much power is needed to raise a load of 90kg a distance of 150m in 20s
A
6,621J
