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Plz help answer this question

Plz help answer this question-example-1

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For an inclined plane, the mechanical advantage is calculated by,

M.A = (length of the incline)/(Height of the incline)

As the efficiency is 70%, we get

M.A =
(70)/(100)*(10)/(3)

=7/3

Force required to lift the load of 60 kg = Weight of the object/M.A

=
(60*9.8)/(7/3)

=252 N

To decrease the amount of effort, we can increase the length of the incline without changing its efficiency.

User Nachiket Kate
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