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?
9800 J
1000
2000 J
None of the above​

Answer 1

Answer:

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

$: \to \: f = m.a$

$: \to \: p.e = m \times g \times h$

Solution

❐According to second law of motion:

$\boxed{f = m.a}$

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.

$\boxed{ p.e = m \times g \times h}$

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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Answer is B

Potential energy is energy stored in an object. This energy has the potential to do work. Gravity gives potential energy to an object. This potential energy is a result of gravity pulling downwards. The gravitational constant, g, is the acceleration of an object due to gravity. This acceleration is about 10 meters per second on earth. The formula for potential energy due to gravity is PE = mgh. As the object gets closer to the ground, its potential energy decreases while its kinetic energy increases.

In this case, a body of mass 1 kg kept at a height of 10 m. So the potential energy is given as 100 *10 = 1000

Hence, the potential energy of a body of mass 5 kg kept at a height of 10 m is 1000 J.