14.1 - work and power Flashcards
1
Q
what is work?
A
the product of force and distance
2
Q
what is needed for force to do work on an object?
A
force must act in the same direction as the object
3
Q
work requires what?
A
motion
4
Q
work depends on what?
A
direction
5
Q
work is only done when…
A
force causes a change in the motion of an object
6
Q
SI unit for work?
A
Joule (J)
7
Q
what is power?
A
the rate at which work is done
8
Q
what does power measure?
A
the amount of work done in a certain amount of time
9
Q
SI unit for power
A
Watts (W)
10
Q
power equation
A
power = work/time
11
Q
1 hp is equal to…
A
746 watts
12
Q
when do you require more power?
A
doing work at a faster rate
