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 ______________________ energy.

Answer 1

Answer:

945J

Explanation:

Since the ball is moving, it means the ball is exhibiting kinetic energy.

From the information provided in the question above, we obtained the following:

M = 2.1 kg

V = 30 m/s

K.E =?

K.E = 1/2 MV^2

Now, we input the values of the various variables to obtain the kinetic energy as shown below

K.E = 1/2 x 2.1 x (30)^2

K.E = 1 /2 x 2.1 x 900

K.E = 945J

The ball has a kinetic energy of 945J