A ball rolling on a smooth horizontal floor strikes an identical ball and comes to a stop. The second ball starts moving at a speed slightly slower than that of the first ball before it came to a stop. A graph showing the kinetic energy of the first ball over time is shown below.
Why did the first ball come to a stop on collision?
Answers
Answer:
Average number of collisions between reacting molecules per unit of time per moles of reactant.
Explanation:
From the above question,
A ball on the smooth surface is rolling faster than a ball on the rough surface because of following reasons:-
Whenever one body moves over another or any surface then friction is working between the two surfaces.
Friction always tries to stop the movement of the body.
A rough surface has higher friction than a smooth surface, that's why a ball rolls faster on the smooth surface than on the rough surface.
A smooth surface reduces friction whereas a rough surface increases friction.
Here we need to know about the collision:
The distance between the centers of two molecules taking part in a collision at the time of their closest approach is called collision diameter.
Collision number refers to collision density or collision frequency. It is defined in chemical kinetics in the background of theoretical kinetics. Its symbol is Z. It is the average number of collisions between reacting molecules per unit of time per moles of reactant.
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Answer: Its kinetic energy was converted to thermal energy and the kinetic energy of the second ball during the collision.