A 0.1000-kg marble is fired by a boy from a slingshot at point A, at a height of 1.500 m from the ground. It hits a frictionless inclined concrete wall at point B, which is 30.0 m away from the boy. After hitting the wall, the marble rebounds with a velocity, VB. directed 140* from the horizontal as shown. The ball finally hits point C on the frictionless floor. The velocity of firing, VA, is 20.0 m/s, directed 45.0° with the horizontal
A 0.1000-kg marble is fired by a boy from a slingshot at point A, at a height of 1.500 m from the ground. It hits a frictionless inclined concrete wall at point B, which is 30.0 m away from the boy. After hitting the wall, the marble rebounds with a velocity, VB. directed 140* from the horizontal as shown. The ball finally hits point C on the frictionless floor. The velocity of firing, VA, is 20.0 m/s, directed 45.0° with the horizontal
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Transcribed Image Text:A 0.1000-kg marble is fired by a boy from a slingshot at point A, at a height of 1.500 m
from the ground. It hits a frictionless inclined concrete wall at point B, which is 30.0 m
away from the boy. After hitting the wall, the marble rebounds with a velocity, VB.
directed 140° from the horizontal as shown. The ball finally hits point C on the
frictionless floor. The velocity of firing, VA, is 20.0 m/s, directed 45.0° with the
horizontal.
VA = 20 m/s
14.14 m/s
15.64 m/s
0
6.67 m/s
45°
1.5 m
C!
7.47 m/s
1.692 m/s
2.02 m/s
1.316 m/s
30 m
VB
60°
Which of the following gives the closest value of the
magnitude of the velocity of the ball BEFORE it strikes the
concrete wall at point B?
B
= 140°
Which of the following gives the closest value of the
magnitude of the velocity of the ball AFTER it strikes the
concrete wall at point B?
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