4) A racquetball player encounters a ball coming towards him at a velocity of 22 m/s and at an angle of 5° below the horizontal. He is able to return the ball at a velocity of 30 m/s at an angle of 15° above the horizontal. The 40 gram racquetball is in contact with the racket for 0.04 s. a) Clearly draw coordinate systems for the incoming and outgoing velocity of the racquetball (there should be two). Write out the necessary transformation arrays. b) Draw an FBD of the racquetball. Compute the magnitude of the force exerted by the racquet on the ball. c) Find the angle between the force and horizontal. [Ans. to Check: 6.99°] „V½ = 30 m/s

4) A racquetball player encounters a ball coming towards him at a velocity of 22 m/s and at an angle of 5° below the horizontal. He is able to return the ball at a velocity of 30 m/s at an angle of 15° above the horizontal. The 40 gram racquetball is in contact with the racket for 0.04 s. a) Clearly draw coordinate systems for the incoming and outgoing velocity of the racquetball (there should be two). Write out the necessary transformation arrays. b) Draw an FBD of the racquetball. Compute the magnitude of the force exerted by the racquet on the ball. c) Find the angle between the force and horizontal. [Ans. to Check: 6.99°] „V½ = 30 m/s

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

Question

4) A racquetball player encounters a ball coming towards him at a velocity of 22 m/s and at an
angle of 5° below the horizontal. He is able to return the ball at a velocity of 30 m/s at an
angle of 15° above the horizontal. The 40 gram racquetball is in contact with the racket for
0.04 s.
a) Clearly draw coordinate systems for the incoming and outgoing velocity of the racquetball
(there should be two). Write out the necessary transformation arrays.
b) Draw an FBD of the racquetball. Compute the magnitude of the force exerted by the
racquet on the ball.
c) Find the angle between the force and horizontal. [Ans. to Check: 6.99°]
„V, = 30 m/s
02 = 15°
0,= 5
V, = 22 m/s
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