(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Toby is on a merry-go-round. The coefficient of static friction between his feet and

the merry-go-round is 0.5. Toby is located 2 m from the center.

a. Once Toby starts to slide he is going to slide outward until he falls off the merry-go-round at radius = 3m. How many revolutions will the merry-go-round undergo during this part of his journey?

2. Relevant equations

f(friction) = u(coefficient of Friction) * N(Normal Force) = u*mg

Net F = ma_c = mv^2/r

3. The attempt at a solution

I thought I had to use kinetic friction but I wasn't sure because it wasn't given and there's no way to find it...

so I just used static friction.. f = u * mg

and friction is the only force working in this one.. so F net = f

u*mg = mv^2/r

m's cancel out and I got v = 3.1305m/s as the speed that he will start slipping off the merry-go-round. Then I thought may be I can use Kinematic equations to find the time and find the total revolution.. but I have no idea how to approach it.. help!

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Sliding off from the circular plate

Can you offer guidance or do you also need help?

**Physics Forums | Science Articles, Homework Help, Discussion**