Posted by perry on Friday, September 18, 2009 at 2:25am.
The question is a child slides down a slide with a 28 degree incline and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of the kinetic friction between the slide and the child.

physics  drwls, Friday, September 18, 2009 at 2:43am
If the speed is half, the kinetic energy gain is 1/4 of its frictionless value. That means 3/4 of the potential energy loss in moving down the slide a distance X was turned into frictional heat. Frictional heat is work done against the friction force.
(3/4)X M g sin 28 = M g cos28 * mu * X
The M, g and X cancel out. Solve for the coefficient of friction, mu.
mu = (3/4) tan28

physics  sanches, Saturday, October 17, 2009 at 2:00pm
.399
Answer This Question
Related Questions
 College Physics  A child slides down a slide with a 24 incline, and at the ...
 Physics Dynamics  A child slides down a slide with a 24o incline, and at the ...
 physics  A child slides down a slide with a 28° incline, and at the bottom her ...
 Physics  a child slides down a slide with 26 degrees inclined and at the bottom...
 Physics  A box slides down an inclined plane with an acceleration that is ...
 Physics  I need help with this physics problem: A child slides down a ...
 Help! Desperate, physics  a 40 kg child slides down a frictionless playground ...
 physics  A slideloving pig slides down a certain 35 degree slide in twice the ...
 physics  a slide loving pig slides down a certain 16° slide in twice the time ...
 Physics  a slide loving pig slides down a certain 45° slide in twice the time ...
More Related Questions