how to calculate speed in circular motion from the tangential acceleration which is F=98*sin(πt/10) with static friction=0,2 and dynamic friction= 0.1? Radius is 10 m and mass=50kg
I don't know but actually spinning a 50kg weight around on a 10m chain at what I think the speed should be sounds like fun.
I do wish I did though, but alas, pi, circles, and sine.
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Anonymous2012-05-29 7:45
Subtract only dynamic friction, as it won't be moving until it overcomes the force of static friction.
Although looking at the equation, you're only going to get motion when t=5,15,25 etc.
So it'll have an acceleration of 0.98m/s^2 at these times, with a persistent static friction force acting against it. From here you should be able to calculate the average velocity.