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A horizontal force P is exerted on a 20-kg box in order to slide it up a 30° incline.

Problem 3:


A horizontal force P is exerted on a 20-kg box in order to slide it up a 30° incline. The friction force retarding the motion is 80N. How large must P be if the acceleration of the moving box is to be


a) Zero?

b) 0.75m/s2?





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Answer #1

Pero masino FAN mg img con 40 Os 30 Alorgy - diecton: N = ma aso + P sino Force of hichon 80N mass m = 20kg. For wovement wit

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