Question

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

Answer 1

Explanation:

Explanation:

You have just given the ball kinetic energy, which is given by the following equation:

#E_k=0.5 times m times v^2#

So the energy the ball has the moment after you hit it is:

#E_k=0.5 times 2.1 times (30)^2#

#E_k=945 J#

Answer 2

Answer:

You have just given the ball kinetic energy, which is given by the following equation:

E

k

=

0.5

×

m

×

v

2

So the energy the ball has the moment after you hit it is:

E

k

=

0.5

×

2.1

×

(

30

)

2

E

k

=

945

J

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