work done and power Flashcards
1
Q
unit for work done
A
j- joules
2
Q
equation for work done
A
work done = force x distance
3
Q
unit for force
A
n = newton
4
Q
unit for distance
A
m - meter
5
Q
what is power
A
power is the amount of work done or energy transferred in a given time
6
Q
equation for power
A
power = work done
——————–
time
7
Q
unit for power
A
w - watt
8
Q
unit for energy
A
j - joule
9
Q
what does a moving object have ?
A
-momentum
10
Q
what is momentum
A
- tendency of the object moving in the same direction
11
Q
the equation for momentum ?
A
- momentum = mass x velocity
kgm/s = kg x m/s
p=m x v
12
Q
what is the conservation of momentum ?
A
- total momentum before a collision = the total momentum after a collision
13
Q
what two factors does momentum mean ?
A
-momen(velocity) -turn (mass)
