PROBLEM 11.59 (Continued)
PROBLEM 11.60*
The system shown starts from rest, and the length of the upper cord is adjusted so
that A, B, and C are initially at the same level. Each component moves with a
constant acceleration, and after 2 s the relative change in position of block C with
respect to block A is 280 mm upward. Knowing that when the relative velocity of
collar B with respect to block A is
80 mm/s
downward, the displacements of A
and B are 160 mm downward and 320 mm downward, respectively, determine
(a) the accelerations of A and B if 2
10 mm/s ,
B
a
(b) the change in position of
block D when the velocity of block C is 600 mm/s upward.
PROBLEM 11.60* (Continued)
PROBLEM 11.60* (Continued)
PROBLEM 11.61
A particle moves in a straight line with a constant acceleration
of 4 2
ft/s for 6 s, zero acceleration for the next 4 s, and a
constant acceleration of 4 2
ft/s for the next 4 s. Knowing that
the particle starts from the origin and that its velocity is 8 ft/s
during the zero acceleration time interval, (a) construct the
vt
and
x
t
curves for 0 t 14 s, (b) determine the
position and the velocity of the particle and the total distance
traveled when t 14 s.
x
Problem 11.62
A particle moves in a straight line with a constant acceleration
of 4 2
ft/s for 6 s, zero acceleration for the next 4 s, and a
constant acceleration of 4 2
ft/s for the next 4 s. Knowing that
the particle starts from the origin with 0
v 16 ft/s,
(a) construct the vt
and
x
t
curves for 0 t 14 s,
(b) determine the amount of time during which the particle is
further than 16 ft from the origin.
x
PROBLEM 11.62 (Continued)
PROBLEM 11.63
A particle moves in a straight line with the
velocity shown in the figure. Knowing that
540 mx
at t 0, (a) construct the at
and
x
t
curves for 0t
50 s, and
determine (b) the total distance traveled by
the particle when 50 s,t
(c) the two times
at which 0.x
PROBLEM 11.63 (Continued)
PROBLEM 11.64
A particle moves in a straight line with the
velocity shown in the figure. Knowing that
540 mx
at t 0, (a) construct the at
and
x
t
curves for 0 50 s,t and
determine (b) the maximum value of the
position coordinate of the particle, (c) the
values of t for which the particle is at
100 m.x