Question

A rubber ball falling from a height of 6 m rebounds from a hard floor to a height 3m. Find % loss of energy ​

Answer 1

Given :-

★ A rubber ball falling from a height of 6 m rebounds from a hard floor to a height 3m.

Therefore,

H = 6 m

H' = 3m

To Find :-

★ The % loss of energy during the impact.

Solution :-

We know,

☞ Potential energy, P.E = mgh

According to the question__

⭐potential energy due to height 6 m

(P.E)1 = mgH

⭐potential energy due to height 3m

(P.E)2= mgH'

We know that,

% Energy loss

= {(P.E)1 - (P.E)2}/(P.E)1 × 100

⟹ % Energy loss

= (mgH -mgH') / mgH × 100

⟹ % Energy loss

= ( H -H') /H × 100

⟹ % Energy loss

= (6-3) /6 × 100

⟹ % Energy loss = 50

Hence,

Energy loss = 50 %

Know more :-

What is potential energy?

=> Potential energy is the energy held by an object because of its position relative to other objects.

There are two main types of potential energy:

1. Gravitational potential energy

2. Elastic potential energy

$\bold\blue{@ItzSilentColleen }$

Answer 2

${ \huge{ \underline{ \underline{ \sf{ \green{GivEn : }}}}}}$

• A rubber ball falling from a height of 6 m rebounds from a hard floor to a height 3m.

Therefore,

• H = 6 m

• H' = 3m

${ \huge{ \underline{ \underline{ \sf{ \green{To \: find :}}}}}}$

• The % loss of energy during the impact.

${ \huge{ \underline{ \underline{ \sf{ \green{SoluTion : }}}}}}$

We know,

• Potential energy, P.E = mgh

According to the question__

• potential energy due to height 6 m

(P.E)1 = mgH

• potential energy due to height 3m

(P.E)2= mgH'

We know that,

% Energy loss

= {(P.E)1 - (P.E)2}/(P.E)1 × 100

⟹ % Energy loss

= (mgH -mgH') / mgH × 100

⟹ % Energy loss

= ( H -H') /H × 100

⟹ % Energy loss

= (6-3) /6 × 100

⟹ % Energy loss = 50

Hence,

Energy loss = 50 %

Know more :-

What is potential energy?

=> Potential energy is the energy held by an object because of its position relative to other objects.

There are two main types of potential energy:

1. Gravitational potential energy

2. Elastic potential energy