A child pulls a 15 kg sled containing a 5.0 kg dog along a straight path on a ho

Question

A child pulls a 15 kg sled containing a 5.0 kg dog along a straight path on a horizontal surface. He exerts a force of 55 N on the sled at an angle of 20 degrees above the horizontal. The coefficient of friction between the sled and the surface is 0.22.

B) Calculate the normal force of the surface on the system.

A child pulls a 15 kg sled containing a 5.0 kg dog along a straight path on a horizontal surface. He exerts a force of 55 N on the sled at an angle of 20 degrees above the horizontal. The coefficient of friction between the sled and the surface is 0.22. B) Calculate the normal force of the surface on the system.

Explanation / Answer

N + 55sin20 = (15+5)g  (balancing force in y direction)

=> N = 20*9.81 - 55sin20

        = 177.39 Newton

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