an object of mass 5kg is lifted up . through a distance of 2m calculate the work done against the force of gravity acceleration due to gravity is 9.8m/s
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11th
Physics
Work, Energy and Power
Work Done by a Variable Force
The work done in dragging a...
PHYSICS
The work done in dragging a block of mass 5 kg on an inclined plane of height 2 m is 150 Joule. The work done against the frictional force will be
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From FBD,
F=mgsinθ+f
or F=mg
x
h
+f as(sinθ=
x
h
)
or Fx=mgh+fx
or W
F
=mgh+W
f
as work done = force × distance.
150=5×10×2+W
f
or W
f
=150−100=50J
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