Question

A body of mass 10kg falls from a height of 10 meters. The work done by the gravitational force is (9.8m/sec^2) :

Answer 1

980

Explanation:

The work done by gravitational force=mgh

Body of mass(m)= 10kg

Gravitational force (g)= 9.8

Height from body (h)= 10m

=10*10*9.8

=980J

Answer 2

AnswEr

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GivEn that, there's a body of mass 10kg which falls from a height of 10 m. We've to find the work done by the gravitational force if g = 9.8 m/s².

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• Mass, m = 10 kg

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• Height, h = 10 m

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• Acceleration due to gravity, g = 9.8 m/s²

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We know that,

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$:\implies$ W = F × S

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Also, F = m × a

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Substituting the values :

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$:\implies$ W = m × a × S

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$:\implies$ W = 10 × 9.8 × 10

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$:\implies$ W = 980 J

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$\therefore$ The work done by the gravitational force is 980 J.

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» Additional information :

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• Work can be defined as the product of the element of the force within the direction of the displacement and hence as a result magnitude of this displacement.

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W = F × d ⠀⠀[Relation b/w force & displacement ]

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• SI unit of work is the joule (J).