Question

a body of mass 40 kg climbs vertically upwards on a coconut tree to a height of 10 M. Calculate (a)the work done by the body (b)potential energy gained​

Answer 1

The work done by the body and potential energy gained is 3920 J.

Explanation:

Given that,

Mass of body = 40 kg

Height = 10 m

We need to calculate the work done

Using formula of work done

In this case,

Work done = potential energy gained

$W = U=mgh$

Where, m = mass

g = acceleration due to gravity

h = height

Put the value into the formula

$W=40\times9.8\times10$

$W=3920\ J$

Hence, The work done by the body and potential energy gained is 3920 J.

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Answer 2

Answer:4000J

Explanation:

a)the work done by the boy

w=F×S

=mgh×h

=40×10×10

=4000J

(b) the P.E. gained

W=P.E.=4000J

or

P.E.=mgh

=40×10×10=4000J

thank you !

Hope it helped you !