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Physics
Problem
An incomplete derivation is shown below:
P
=
W
t
=
F
×
_
_
_
t
=
F
v
P = \dfrac{W}{t} = \dfrac{F \times \_\_\_}{t} = F v
P
=
t
W
=
t
F
×
___
=
F
v
Which quantity correctly fills the blank so that the derivation is valid for motion with constant force along a straight line? a)
(
u
+
v
)
t
(u+v)t
(
u
+
v
)
t
b)
1
2
a
t
2
\dfrac{1}{2} a t^{2}
2
1
a
t
2
c)
s
s
s
d)
v
2
−
u
2
2
a
\dfrac{v^{2}-u^{2}}{2a}
2
a
v
2
−
u
2
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