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(Solved): The force P is applied to the 39-kg block when it is at rest. Determine the magnitude and direction ...
The force P is applied to the 39-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=135N, and (c) P=190N. (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 \mu _(s)=0.20 and \mu _(k)=0.16, respectively. The friction force is
positive if up the incline, negative if down the incline.
Answers:
(a) F=
N
(b) F=
(c) F=
(d) P=
N