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PROBLEM 11.106
At halftime of a football game souvenir balls are
thrown to the spectators with a velocity v0.
Determine the range of values of v0 if the balls are
to land between Points B and C.
PROBLEM 11.106 (Continued)
PROBLEM 11.107
A basketball player shoots when she is 16 ft from the
backboard. Knowing that the ball has an initial velocity
v
0
at an
angle of 30° with the horizontal, determine the value of v
0
when
d is equal to (a) 9 in., (b) 17 in.
PROBLEM 11.108
A tennis player serves the ball at a height h 2.5 m with an initial velocity of v0 at an angle of 5° with the
horizontal. Determine the range for which of v0 for which the ball will land in the service area which extends
to 6.4 m beyond the net.
PROBLEM 11.108 (Continued)
PROBLEM 11.109
The nozzle at A discharges cooling water with an initial
velocity
v
0
at an angle of 6° with the horizontal onto a grinding
wheel 350 mm in diameter. Determine the range of values of
the initial velocity for which the water will land on the
grinding wheel between Points B and C.
PROBLEM 11.109 (Continued)
2
1
22
(9.81)(0.050388)
PROBLEM 11.110
While holding one of its ends, a worker lobs a coil of rope over the
lowest limb of a tree. If he throws the rope with an initial velocity
v
0
at an angle of 65° with the horizontal, determine the range of values
of v
0
for which the rope will go over only the lowest limb.
PROBLEM 11.110 (Continued)
PROBLEM 11.111
The pitcher in a softball game throws a ball with an initial velocity
v
0
of 72 km/h at an angle
with the
horizontal. If the height of the ball at Point B is 0.68 m, determine (a) the angle
, (b) the angle
that the
velocity of the ball at Point B forms with the horizontal.
