The force P is applied to the 30-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 85 N, and (c) P = 131 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are us = 0.18 and uk = 0.12, respectively. The friction force is positive if up the incline, negative if down the incline. 30 kg 18' H.= 0.18 H = 0.12 12 Answers: (a) F= N (b) F = (c) F = (d) e
The force P is applied to the 30-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 85 N, and (c) P = 131 N. (d) What value of P is required to initiate motion up the incline? The static and kinetic coefficients of friction between the block and the incline are us = 0.18 and uk = 0.12, respectively. The friction force is positive if up the incline, negative if down the incline. 30 kg 18' H.= 0.18 H = 0.12 12 Answers: (a) F= N (b) F = (c) F = (d) e
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The force P is applied to the 30-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 85 N, and (c) P = 131 N. (d) What value of P is required to initiate
motion up the incline? The static and kinetic coefficients of friction between the block and the incline are us = 0.18 and µk = 0.12, respectively. The friction force is positive if up the incline, negative if down the incline.
%3D
P
30 kg
18°
H, = 0.18
H = 0.12
12
Answers:
(а) F 3D
N
(b) F
(c) F =
(d) P =
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