A5.0 g coin is placed 15 cm from the center of a turntable. the coin has static and kinetic coefficients of friction with the turntable surface of μs = 0.70 and μk= 0.50. the turntable very slowly speeds up.

what is the angular speed in rpm when the coin slides off?

Explanation:

The coin will slide when the centripetal force is too much for the friction to hold, that is, when it is equal to the maximum static friction, so:

Or:

Which means (since on the vertical direction only the normal and weight are acting):

So for our values we have:

Since , we convert our angular speed using this conversion factor (which is equal to 1 thus not altering our result):

it doesn't. it was imagined up in the middle ages.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.