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Standard VIII
Physics
Normal Force
A gardener pu...
Question
A gardener pushes a lawn roller through a distance of 100m with a force of 50N . Calculate the wages if he is to be paid Re:1 for
25 J of work It is given that the applied force is inclined 60
o
to the direction of motion .
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Solution
Work
done
=
f
×
s
cosθ
θ
is
the
angle
between
direction
of
force
and
distance
.
Work
done
=
50
×
100
cos
60
°
=
5000
×
1
2
=
2500
J
for
25
J
of
work
he
get
1
rupee
for
2500
J
of
work
he
will
get
=
2500
25
=
Rs
100
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