Homework Help: Dynamics

Posted by Connor on Friday, September 28, 2012 at 4:32am.

The rotor is an amusement park ride where a person enters the Rotor when it is stationary and stands against the wall with their back against the wall. The rotor then begins to spin around a vertical axis. After reaching cruising speed, the floor drops away and the patron is left suspended against the wall. Assume that the rate of rotation increases according the the expression (alpha)=k(theta)until the floor drops ((alpha)is angular acceleration in rad/s2, theta is angular position in radians). After this point, the rotor spins at a constant speed until the flor rises again. Determine an expression for the number of revolutions the motor should turn before it is safe to drop the floor. The coefficient of friction between the rider and the wall is u_s.

Dynamics - bobpursley, Friday, September 28, 2012 at 6:49am
alpha is when the centripetal acceleration is equal to the friction force on the wall.
m w^2/r=mu*mg
solve for w.

This problem is a thinking exercise, not a plug and compute.

Answer this Question

Related Questions

Physics - The diameters of the main rotor and tail rotor of a single-engine ...
Physics / Dynamics - After the fuel is turned off, the rotor of a jet engine ...
Physics - The diameters of the main rotor and tail rotor of a single-engine ...
Electricity - A 3-phase 50Hz, 8 pole induction motor has an effective stator to ...
Physics - The diameters of the main rotor and tail rotor of a single-engine ...
Physics - A centrifuge rotor rotating at 11500 is shut off and is eventually ...
phy - A centrifuge rotor rotating at 13,000 rpm is shut off and is eventually ...
Physics - A centrifuge rotor rotating at 10700 rpm is shut off and is eventually...
physics - A small motor is mounted on the axis of a space probe with its rotor (...
physics - A centrifuge rotor rotating at 7,000 rpm is shut off and is eventually...

For Further Reading

First Name:
School Subject:
Answer: