20.  A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 24 N. Starting from rest, the sled attains a speed of 2.0 m/s in 8.0 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

Sum of forces

 

Since the sled is not moving up and down but it is moving horizontally.

 

Work – Energy Theorem

 

Since we start from rest.

Only fk and H do non-zero work here

 

 

and

 

 

Solve for

 

 

 

 

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This page last updated on January 11, 2020