A 13-g coin slides upward on a surface that is inclined at an angle of 17 above

Question

A 13-g coin slides upward on a surface that is inclined at an angle of 17 above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.27; the coefficient of static friction is 0.34.

Part A Find the magnitude of the force of friction when the coin is sliding Express your answer using two significant figures Submit My Answers Give U incorrect; Try Again; 5 attempts remaining Part B ind the direction of the force of friction when the coin is sliding O Down the incline Up the incline O Down, perpendicular the incline O Up, perpendicular the incline Submit My Answers Give Up Part C Find the magnitude of the force of friction after it comes to rest. Express your answer using two significant figures Submit My Answers Give Up Part D ind the direction of the force of friction afte r it comes to rest. O Down the incline O Up the incline O Down, perpendicular the incline Up, perpendicular the incline Submit My Answers Give Up

Explanation / Answer

a)

given
mass m = 0.013kg
coefficient of kinetic friction k =0.27
angle = 170
the coefficient of kinetic friction is fk =kN
= kmgcos170
= (0.27)(0.013kg)*9.8m/s2 *0.9563
= 32.92*10-3N
b)

up the inclined side

c)
the coefficient of static friction is s= 0.34
fs = sN
=smgcos170
= (0.34)(0.013kg)*9.8m/s2*0.9563
= 41.4655*10-3 N

d)

up the inclined side

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