Question

A mass of 60 kg is moved vertically upwards through a distance of 4 m. If the gravitational acceleration is 9.8ms^-2, then the work done against gravity is​

Answer 1

2352 Joules

Explanation:

because work done = force × displacement

displacement = 4 m

force = mass × acceleration

force : 60×9.8 = 588 Newton

work done : 588×4 = 2352 Joules.

Answer 2

Answer:

W = 2352 J

Explanation:

We know that when an object is lifted to some height against gravity we call that particular energy as Gravitational potential energy.

Here in this question a body of mass (m = 60 kg) is lifted up to a height (h = 4 m).

And Given, acceleration due to gravity (g) = 9.8 $ms^{-2}$

Hence, the work done against gravity(W) is m × g × h

So, W = 60kg × 9.8 $ms^{-2}$ × 4 m

Therefore,W = 2352 J

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