To assist with a class demonstration, a student (whose mass is 60 kg) filled a water balloon with 2 kg of water. He then climbed to the second floor (10 metres) of the school and held the balloon out of a window. How much work did the student do?

Question

Marshall Blair

Physics

30 September, 07:54

To assist with a class demonstration, a student (whose mass is 60 kg) filled a water balloon with 2 kg of water. He then climbed to the second floor (10 metres) of the school and held the balloon out of a window. How much work did the student do?

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Answers (1)

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Alexzander Frederick · Answer 1

W = 6082.2 [J]

Explanation:

To solve such problems we must use the definition of work. Which tells us that work is equal to the product of force by a distance.

The force will be equal to the product of the mass combined by the gravitational force.

F = m * g

where:

m = combined mass = 60 + 2 = 62 [kg]

g = gravity = 9.81 [m/s^2]

F = 62 * 9.81 = 608.22 [N]

And the work done.

W = F * d

W = 608.22 * 10

W = 6082.2 [J] units in Joules