# What do I do for these problems ?

What do I do for these problems!!?

## Homework Statement

1.A merry-go-round makes one complete revo-
lution in 12.2 s. A 49.4 kg child sits on the
horizontal floor of the merry-go-round 2.3 m
from the center.
Find the child’s acceleration. The accelera-
tion of gravity is 9.8 m/s2 .

2.Find the horizontal force of friction that acts
on the child.

3.What minimum coefficient of static friction is
necessary to keep the child from slipping?

## Homework Equations

f=M*A
a=(Tangential speed)^6/r
Tangential speed=2pi r/time

## The Attempt at a Solution

Don't know how to get acceleration

Last edited:

cepheid
Staff Emeritus
Gold Member

Welcome to PF,

## Homework Statement

1.A merry-go-round makes one complete revo-
lution in 12.2 s. A 49.4 kg child sits on the
horizontal floor of the merry-go-round 2.3 m
from the center.
Find the child’s acceleration. The accelera-
tion of gravity is 9.8 m/s2 .

2.Find the horizontal force of friction that acts
on the child.

3.What minimum coefficient of static friction is
necessary to keep the child from slipping?

## The Attempt at a Solution

If the child moves in a CIRCLE at a constant speed, then what MUST be true about the child's acceleration? In other words, what kind of acceleration must he/she be experiencing? How do you go about computing this type of acceleration?

Is it the centrapical Acceleration?

Help?

cepheid
Staff Emeritus