Power Flashcards
1
Q
Momentum formula
A
P=mv
2
Q
Δmomentum formula
A
ΔP= mΔv
3
Q
Momentum before a system=
A
Momentum after
4
Q
Work formula
A
W=Fd
5
Q
Impulse formula
A
Ft= ΔP
6
Q
PE formula
A
mgh
7
Q
PE of a spring formula
A
1/2kx^2
8
Q
KE formula
A
1/2mx^2
9
Q
F formula
A
m*g
10
Q
What is power
A
the rate at which work is done
11
Q
power=
A
W/t
fd/t
f/v
12
Q
Units of power
A
joules/sec (Watts)
13
Q
Does efficiency have an equation?
A
equation not given
14
Q
Efficiency Answer should always be…
A
less than 1
15
Q
Efficiency is often expressed as
A
a percentage (multiply decimal by 100)
