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

Explanation:

Kinetic energy = 0.5 x Mass x Velocity²

Here the ball has mass and velocity.

So the ball has kinetic energy.

Kinetic energy = 0.5 x Mass x Velocity²

Mass = 2.1 kg

Velocity = 30 m/s

Kinetic energy = 0.5 x 2.1 x 30²

Kinetic energy is 945 J

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the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement