A horizontal force F is exerted on a 20-kg box to slide it up a 30 incline.
Question:
A horizontal force F is exerted on a 20-kg box to slide it up a 30° incline. The friction force retarding the motion is 80 N. How large must F be if the acceleration of the moving box is to be
(a) Zero and
(b) 0.75 m/s2?
The situation resembles that of Fig. 3-18.
Transcribed Image Text:
500 N 321 N 40° 383 N 0.643 mg 40° ↑F 25 kg 0.766mg 40° Fig. 3-18 15
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