Question

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s

Answer 1

Explanation:

KE = 1/2 mv²

= 1/2× 2.1×30²

= 2.1×450

= 945j

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Answer 2

Answer:

Answer

The Ball has

Kinetic Energy of > 945.

Given:

Mass of volleyball = 2.1 kg

Speed at which ball leaves

the hand 30 m/s

To Find:

.The energy of the ball

Solution:-

Given that,

The ball leaves the hand with

speed of 30m/s.

Hence, it is clear that the ball is

in state of motion and will

possess Kinetic Energy.

We know,

K.E =mv|

2

where,

.K.E = Kinetic energy

possessed by ball

m mass of the ball

V speed of the ball

Substituting in the Formula:-

K.E =x2.1 x (30)2

K.E = x 2.1 x 900

K.E = 1x 2.1 x 450

K.E =945 J

Therefore, the ball will have

Kinetic Energy and of 945 J.

Explanation:

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