Unformatted text preview: (il (a\ At a certain instant, the 80lb crate has a velocity
of 30 ft/ sec up the 20° incline. Calculate the time t
required for the crate to come to rest and the cor
responding distance d traveled. Also, determine
the distance d’ traveled when the crate speed has
been reduced to 15 it/ sec. 120 = 30 ft/sec The collar A is free to slide along the smoothshaft 7 B mounted in the frame. The plane of the frame is
vertical. Determine the horizontal acceleration a of
the frame necessary to maintain the collar in a
ﬁxed position on the shaft. The 10kg steel sphere is suspended from the l5kg
frame which slides down the 20° incline. If the 00
efﬁcient of kinetic friction between the frame and
incline is 0.15, compute the tension in each of the
supporting wires A and B. Tia102
H.W. 2 : If the coefﬁcients of static and kinetic friction be
(413 tween the 20kg block A and the 100kg cart B are
both essentially the same value of 0.50, determine
the acceleration of each part for (a) P = 60 N and
(b) P = 40 N. .12qu ( 5\ The system is released from rest with the cable
taut. For the friction coefﬁcients as = 0.25 and
uh = 0.20, calculate the acceleration of each body
and the tension T in the cable. Neglect the small
mass and friction of the pulleys. (90 kg ...
View
Full Document
 Winter '08
 Eke

Click to edit the document details