A tennis ball is thrown up to a height of 26 m. Neglecting air resistance, with what initial velocity was it thrown up with? Use Energy equations only

v = 22.58[m/s]  

Explanation:

To solve this problem we will use the principle of energy conservation, which tells us that potential energy is transformed into kinetic energy or vice versa.

We must remember that potential energy is defined as the product of mass by gravity by height.

And the kinetic energy can be calculated by means of the following expression.

Now equalizing the two equations we can determine the initial velocity.

d eras and periods