On roller blades you horizontally toss a ball away from you. the mass of the ball is one tenth of your mass. compared with the velocity you give to the ball, your recoil velocity will ideally

one tenth of the velocity of the ball.

Explanation:

Recoil velocity is the velocity at which a person's body moves when he fires a bullet or an object  with a particular mass and speed. The following formular is used to calculate recoil velocity.

mv = MV.....................equation 1

where:

From the question we know that   . so we substitute this into equation 1. we get;

therefore your recoil velocity will be one tenth the velocity of the ball

this means that the temperature of both substances will be equal

the body's situation won't change the forces are equal opposit and on the same body