During a circus act, a performer thrills the crowd by catching a cannon ball shot at him. the cannon ball has a mass of 7.5 kg and the horizontal component of its velocity is 8.85 m/s when the 73.5-kg performer catches it.

The recoil velocity is 0.819 m/s.

Explanation:

Given that,

Mass of ball m= 7.5 kg

Velocity v= 8.85 m/s

Mass of performer m'= 73.5 kg

Suppose if the performer is on nearly friction less roller skates, we need to calculate his recoil velocity

We need to calculate the recoil velocity

Using law of conservation momentum

Where, m = mass of ball

m' = mass of performer

v = velocity of ball

Put the value into the formula

Put the value into the formula

Hence, The recoil velocity is 0.819 m/s.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this