Recent content by PJ81

Sorry, I didn't make it up , I stuffed up as the letter R is normal force in this case not the radius. Anyway, is it as simple as the coin starts moving at the point where the tangental force is greater than the frictional force? Fat x t = Ff t=Ff/Fat Fat=alpha x Radius x m...

Homework Statement A coin is placed on a record turntable at a distance of 10cm from the turntable axis. The coefficient of static friction between the coin and the turntable is 0.21. If the turntable starts from rest with a constant angular acceleration of 1.2 rad/s2, how much time passes...

Whoops! thanks for that denverdoc.

Homework Statement A tanker ship with a mass of 10000Kg is moving with constant velocity into a harbour. Two tugboats interact with the front of the boat with a net force of 10464KN, what acceleration does it undergo? Homework Equations a=F/m The Attempt at a Solution...