Question

a body of mass 3 kg lies on the surface of a table 2m high .it is moved on the surface by 4m the change in potential energy will be

Answer 1

hii
here is your answer

1)potential energy =mgh
3×-9.8×2
58.8 j

2) potential energy =mgh
3×-9.8×6
=176.4

change in potential energy= 176.4-58.8
117.6

hope it helps

plz mark brainliest

Answer 2

Concept:

Potential Energy is a very vast and basic concept of Physics and it helps in the sums of the Physical Newtonian Motion.

Given:

Mass of the body is

$3kg$

and is placed on a table whose height is

$2m$

and then it is moved to a table whose height is

$4m$

Find:

We have to Find the Change in Potential Energy.

Solution:

Applying the formula of Potential Energy,

$u = mgh$

taking accleration due to gravity as negative and

$9.8m {s}^{ - 2}$

we get the intial potential Energy as,

$u = mgh \\ u = 3 \times - 9.8 \times 2 \\ u = - 58.8 \: joules$

and the final potential Energy as

$u = mgh \\ u = 3 \times - 9.8 \times 6 \\ u = - 176.4 \: joules$

therefore the Change in Potential Energy is

$final - inital = - 176.4 + 58.8 = - 117.6 \: joules$

Hence, the Change in Potential Energy is

$- 117.6 \: joules$

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