Iris and Javier are playing on a playground. Iris : It’s your turn to sit on the

Question

Iris and Javier are playing on a playground.
Iris: It’s your turn to sit on the merry-go-round, Javier!
Javier: Iris, I see you haven’t been holding on as you sit on the merry-go-round. Well, I can do that too – and I won’t slide off, as you just did. You see, since I’m heavier, the force of static friction will be greater for me than it was for you. So, pfffft.
Iris: Actually, Javy, you might want to check your physics notes again…

What’s wrong with Javier’s argument? Support your answer with a clear diagram and a
derivation.

Explanation / Answer

Here ,

the static frictional force is given as

f = us* N

where us is the static frictional coeffcient

NOw , for the accelration on mary go round

m* v^2/r = us * m*g

v^2 = us*g * r

hence , the velocity of round does not depend on mass

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