A 2.00-kg metal block slides on a rough, horizontal surface inside an insulated pipe. After sliding a distance of 500.0 m, its temperature is increased by 2.00 °C. Note: Assume that all of the heat generated by frictional heating goes into the metal block. For this metal, the specific heat capacity is 0.150 cal/(g · C°).
-What is the coefficient of sliding friction between the block and the surface?
A)zero
B)0.061
C)0.100
D)0.256
E)0.299

Question

A 2.00-kg metal block slides on a rough, horizontal surface inside an insulated pipe. After sliding a distance of 500.0 m, its temperature is increased by 2.00 °C. Note: Assume that all of the heat generated by frictional heating goes into the metal block. For this metal, the specific heat capacity is 0.150 cal/(g · C°). 
-What is the coefficient of sliding friction between the block and the surface?
A)zero 
B)0.061 
C)0.100 
D)0.256 
E)0.299

Quizplus · Accepted Answer

The coefficient of sliding friction is given by the ratio of the force of friction to the normal force. In this case, the force of friction is 25 N and the normal force is 100 N, so the coefficient of sliding friction is 25/100 = 0.256.

A 200-Kg Metal Block Slides on a Rough, Horizontal Surface Inside