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Physics
Physics
Problem
If a constant force
F
⃗
\vec F
F
acts on an object producing a displacement
d
⃗
\vec d
d
, which one of the following expressions represents the work done? a)
∣
F
⃗
∣
∣
d
⃗
∣
|\vec F|\,|\vec d|
∣
F
∣
∣
d
∣
b)
F
⃗
⋅
d
⃗
∣
d
⃗
∣
\displaystyle\frac{\vec F\cdot\vec d}{|\vec d|}
∣
d
∣
F
⋅
d
c)
F
⃗
⋅
d
⃗
\vec F\cdot\vec d
F
⋅
d
d)
∣
F
⃗
∣
∣
d
⃗
∣
sin
θ
|\vec F|\,|\vec d|\sin\theta
∣
F
∣
∣
d
∣
sin
θ
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