Physics-circular force

posted by .

A coin is placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31 rpm is reached, at which point the coin slides off. What is the coefficient of static friction between the coin and the turntable?

• Physics-circular force -

forcefriction=mg*mu
centripetalforce= mw^2r
set them equal, solve for mu.

• Physics-circular force -

i got 3.64 but that is wrong because it is too large

• Physics-circular force -

I didn't get that, I get on the order of .1

Check your work, or post it here.

• Physics-circular force -

mu*9.8=(((30/60)(2pi11))^2)/11
mu=11.8

Similar Questions

1. Physics: Help

A coin is placed 12.5 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 rpm is reached, at which point the coin …
2. Physics

A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly incraeased, the coin remains fixed on the turntable until a rate of 50 rpm is reached at which point the …
3. Physics

A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly incraeased, the coin remains fixed on the turntable until a rate of 50 rpm is reached at which point the …
4. Physics

A coin is placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31 rpm is reached, at which point the coin …
5. College Physics

A 5.0 gram coin is placed 5.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 RPM is reached and the coin slides …
6. physics

A coin is placed 20 cm from the axis of a rotating turntable of variable speed. This speed is gradually increased and the coin remains fixed on the horizontal turntable until a rate of 36 rpm is reached. At this point, the coin slides …
7. Physics

(b)A coin is placed 20 cm from the axis of a rotating turntable of variable speed. This speed is gradually increased and the coin remains fixed on the turntable until a rate of 36 rpm is reached. At this point, the coin slides off. …
8. Physics

A coin is placed 17.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 33 is reached and the coin slides off.What …
9. physics

A coin is placed 14.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31.0 rpm (revolutions per minute) is reached, …
10. phisycis

A coin is placed 14.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31.0 rpm (revolutions per minute) is reached, …

More Similar Questions