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Physics
Physics
Problem
Which of the following expressions correctly gives the work done
W
W
W
when a constant force
F
F
F
produces a displacement
s
s
s
along its own direction? a)
W
=
1
2
F
s
W = \dfrac{1}{2} F s
W
=
2
1
F
s
b)
W
=
F
s
cos
90
∘
W = F s \cos 90^{\circ}
W
=
F
s
cos
9
0
∘
c)
W
=
F
s
W = F s
W
=
F
s
d)
W
=
−
F
s
W = - F s
W
=
−
F
s
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