Question

A box of weight 100 N is lifted to a height of 10 m above ground. How much potential energy will be stored in the box? With steps!!
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Answer 1

Question:

A box of weight 100 N is lifted to a height of 10 m above ground. How much potential energy will be stored in the box?

Given:

• Force= 100 N

• height= 10 m

• gravity= 10 m/sec²

To Find:

• calculate the potential energy

Formula used

→f=m.a

→p.e=m×g×h

Solution:

❐According to second law of motion:

f=m.a

put the value in the above formula to get the mass

➯100 = mass x 10

➯mass = 100/10

➯mass = 10 kg

❐ Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

p.e=m×g×h

where

• p.e= potential energy

• m= mass

• g= gravity

• h= height

put the value in the above formula

➯potential energy= 10 x 10 x 10

➯ potential energy= 1000 Joule

therefore potential energy is 1000 J....

Answer 2

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If h be the required height , the potential energy PE=mgh

or h=PE/mg=

5.8×10

145

=2.5m