# Ap Physics

posted by .

a 70 kg object sits without sliding on a horizontal platform that rotates at a constant rate of one revolution every 6 seconds about a fixed vertical axis. The object moves on a circle of radius r=2m. If meu is now .4 what is the max distance from the cetner that the object can occupy to rotate with out sliding?

• Ap Physics -

You don't need to know the mass or initial radius to answer your questio.

The angular velocity remains
w = 2 pi rad/6 s = 1.047 rad/s

I assume that waht you call meu is the coefficient of STATIC friction, which is what matters here. I will call it mu.

The maximum no-slip radius R when rotating at angular velocity w is given by the relation:
Max. no-slip friction force = centripetal force

M*g*mu = M*R*w^2
The mass M cancels out.

R = g*mu/w^2 = 3.58 m

## Similar Questions

1. ### physics

A 4.00-kg object is attached to a vertical rod by two strings. The object rotates in a horizontal circle at constant speed 6.00 m/s. What is the tension in the upper string and the lower string. Well your missing information here, …
2. ### Physics

An object in uniform circular motion moves at a constant speed around a circle with a fixed radius. Why is the object said to be accelerating though it has a constant speed?
3. ### physic

A 4 kg object is attached to a vertical rod by two strings, as in the figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the lower string.
4. ### Physics

A 2.4 kg object attached to a horizontal string moves with constant speed in a circle of radius R on a frictionless horizontal surface. The kinetic energy of the object is 95 J and the tension in the string is 315 N. Find R.
5. ### physics

A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. N (b) Find the tension in the lower …
6. ### PHysics

A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure. The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. The wheel is a uniform disk …
7. ### Physics

Problem 2- A 4 kg object is attached to a vertical rod by two strings, as in the Figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the horizontal string.
8. ### Physics

An object moves in a circular path at 861 rpm. If the radius of its circular path is 9.27 meters, calculate a) the distance traveled in one complete revolution d = m b) the time it takes for one complete revolution T = seconds c) the …
9. ### Physics- Equilibrium

Which of the following is in equilibrium?
10. ### physics

Consider an object with a mass of 12.5 kg moving at a constant speed in a circular path with a radius of <11.30> m. The object makes one full revolution in <16.60> seconds. Calculate the centripetal acceleration of the …

More Similar Questions