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A boy weighing $40 kg$ makes a high jump of $1.5 m$ . What is his potential energy at the highest point? Take gravitational acceleration as $10 m / s^{2}$ .

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600 J

700 J

800 J

None of these

answer is A.

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Detailed Solution

When a boy weighing

40 kg

makes a high jump of

1.5 m

, his potential energy at the highest point is

600 J

.
Mathematically, Potential energy

(P . E .)

can be expressed as

P . E . = mgh

Where

m

is the mass of the object,

g

is the acceleration due to gravity and

h

is the height of the object.
It has been given that
themass of the boy

(m) = 40 kg

,
height of his jump is

(h) = 1.5 m

and
gravitational acceleration

(g) = 10 m / s^{2}

P . E . = 40 \times 10 \times 1.5

\Rightarrow P . E . = 600 J

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