PROBLEM 11.166
The pin at B is free to slide along the circular slot DE
and along the rotating rod OC. Assuming that the rod
OC rotates at a constant rate
, (a) show that the
acceleration of pin B is of constant magnitude,
(b) determine the direction of the acceleration of pin B.
PROBLEM 11.167
To study the performance of a racecar, a high-speed camera is
positioned at Point A. The camera is mounted on a mechanism
which permits it to record the motion of the car as the car
travels on straightway BC. Determine (a) the speed of the car in
terms of b, ,
and
,
(b) the magnitude of the acceleration in
terms of b,
,
,
and
.
PROBLEM 11.167 (Continued)
PROBLEM 11.168
After taking off, a helicopter climbs
in a straight line at a constant angle
.
Its flight is tracked by radar from
Point A. Determine the speed of the
helicopter in terms of d,
,
,
and
.
PROBLEM 11.168 (Continued)
PROBLEM 11.169
At the bottom of a loop in the vertical plane,
an airplane has a horizontal velocity of 315
mi/h and is speeding up at a rate of 10 ft/s2.
The radius of curvature of the loop is 1 mi.
The plane is being tracked by radar at O.
What are the recorded values of , ,
rr
and
for this instant?
PROBLEM 11.169 (Continued)
PROBLEM 11.170
Pin C is attached to rod BC and slides freely in the slot of rod OA
which rotates at the constant rate .
At the instant when 60 ,
determine (a) and ,r
(b) and .r
Express your answers in terms
of d and .
PROBLEM 11.171
For the racecar of Problem 11.167, it was found that it took 0.5
s for the car to travel from the position
60
to the position
35
.
Knowing that
25 m,b
determine the average speed
of the car during the
0.5-s
interval.
PROBLEM 11.167
To study the performance of a racecar, a
high-speed camera is positioned at Point A. The camera is
mounted on a mechanism which permits it to record the motion
of the car as the car travels on straightway BC. Determine
(a) the speed of the car in terms of b,
,
and
,
(b) the
magnitude of the acceleration in terms of b,
,
,
and
.
PROBLEM 11.172
For the helicopter of Problem 11.168, it was found that when the helicopter was at B, the distance and the
angle of elevation of the helicopter were r
3000 ft
and
20 ,
respectively. Four seconds later, the radar
station sighted the helicopter at r
3320 ft
and
23.1 .
Determine the average speed and the angle of
climb
of the helicopter during the 4-s interval.
PROBLEM 11.168
After taking off, a helicopter climbs in a straight line at a constant angle
.
Its flight is
tracked by radar from Point A. Determine the speed of the helicopter in terms of d,
,
,
and
.