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To what height does a lift go up if a mass of $25 kg$ has lifted with $1250 J$ of energy?

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4 m

5 m

6 m

7 m

answer is B.

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Detailed Solution

5 m

height, a lift has gone up if a mass of

25 kg

has lifted with

1250 J

of energy.
Potential energy is the energy stored in a system or an object due to its position and is formulated as

U = mgh

Where

m = mass

of an object,

g = acceleration due to gravity

(

9.8 m / s^{2}

) and

h = height

Given,

U = 1250 J

, and

m = 25 kg

1250 = 25 \times 10 \times h

h = 5 m

Hence, to a height of

5 m

the lift has gone up if a mass of

25 kg

has lifted with

1250 J

of energy.

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