12201.
The crate is being lifted up the inclined plane using the
motor M and the rope and pulley arrangement shown.
Determine the speed at which the cable must be taken up
by the motor in order to move the crate up the plane with a
constant speed of 4 ft>
12118.
The truck travels in a circular path having a radius of 50 m at
a speed of v = 4 m> s. For a short distance from s = 0, its
#
speed is increased by v = 10.05s2 m> s2, where s is in meters.
Determine its speed and the magnitude of its acceleration
122.
When a train is traveling along a straight track at 2 m/s, it
begins to accelerate at a = 160 v-42 m> s2, where v is in m/s.
Determine its velocity v and the position 3 s after the
acceleration.
s
SOLUTION
a=
dv
dt
dt =
dv
a
v
3
dt =
0
L
3=
dv
-4
2
L