# Question on Laws of Motion observed in Real Life

When I had a school tour to A water park, there I observed that when a heavy boy used to slide down a water slide(and stop at β), he used to go further than where the ligher boy used to stop after sliding(α).
But the friction will act more on Heavier then why is he going further?

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Assuming both the heavy boy and lighter boy are moving with the same velocity, I think its probably because the heavy boy will have more momentum than the lighter boy, p=mv, thus as compared to the lighter boy more friction will be required to stop the heavy boy.Therefore he travels farther.

Nugatory
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But the friction will act more on Heavier then why is he going further?

You're right about the frictional force: It's proportional to the normal force between boy and slide, and that's proportional to the weight so should stop them both at the same point.

That's not what you've observed, so you have to conclude that there is some other force at work as well, one that is not proportional to the weight so Heavy's momentum will carry him farther against that force. Air resistance is a good candidate, and on a water slide fluid resistance from the water is also possible.

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Chestermiller
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Was the light boy wearing a pool shirt and the heavy boy not wearing a pool shirt? This has a big frictional effect on water slides if the people are lying down.

sophiecentaur