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Physics
Physics
Problem
Which of the following expressions gives the average power developed by a force during a time interval
Δ
t
\Delta t
Δ
t
? a)
P
avg
=
Δ
K
Δ
t
P_{\text{avg}}=\dfrac{\Delta K}{\Delta t}
P
avg
=
Δ
t
Δ
K
b)
P
avg
=
W
Δ
t
P_{\text{avg}}=\dfrac{W}{\Delta t}
P
avg
=
Δ
t
W
c)
P
avg
=
d
W
d
t
P_{\text{avg}}=\dfrac{\mathrm d W}{\mathrm d t}
P
avg
=
d
t
d
W
d)
P
avg
=
F
v
P_{\text{avg}}=F v
P
avg
=
F
v
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