On a Planet Where G = 10

question 73

Multiple Choice

On a planet where g = 10.0 m/s² and air resistance is negligible,a sled is at rest on a rough inclined hill rising at 30° as shown in the figure.The sled is allowed to move and it stops on a rough horizontal surface,at a distance of 4.0 m from the bottom of the hill.The coefficient of kinetic friction on the hill is 0.40.What is the coefficient of kinetic friction between the horizontal surface and the sled?

• A)0.10
• B)0.20
• C)0.31
• D)0.40
• E)0.60

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