Question

calculate the work done by a force of 30N in lifting a load of 2kg to a height of 10m (g=10ms_2)​

Answer 1

We know that,

Work (W) = Force (F) × Displacement (s)

Therefore,

W = 30 x 10 =300J

But, the force exerted by the Gravity, = Mg
Hence, negative work done my displacement = Mgh
= 2(-10)(10)
=-200

Therefore Work done = 300 + (-200)
=100J

Answer 2

✳We know that,

Work (W) = Force (F) × Displacement (s)

Therefore,

W = 30 x 10 =300J

But, the force exerted by the Gravity, = Mg

Hence, negative work done my displacement = Mgh

= 2(-10)(10)

=-200

✳Therefore Work done = 300 + (-200)

=100J

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