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

Explanation:

Given parameters:

Mass of volleyball = 2.1kg

Velocity = 30m/s

Unknown:

The nature of the energy possessed by the ball =?

Amount of this energy = ?

Solution:

As the ball is being served and it acquires velocity, it will have a kinetic energy.

Kinetic energy is the energy due to the motion of body. It is mathematically expressed as:

           K.E = m v ²

m is the mass of the body

v is the velocity

Insert the given parameters and solve;

        K.E = x 2.1 x 30²

       K.E = 945J

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.