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1. A table tennis ball weighing 2.45´ 10²N with diameter D= 3.8 ´ 10²m is hit at a velocity of U = 12 m/s with a back spin of angular velocity w as show in Fig. E9.16. What is the value of w if the ball is to travel on a horizontal path, not dropping due to the acceleration of gravity? (30%)

1. A table tennis ball weighing 2.45´ 10²N with diameter D= 3.8 ´ 10²m is hit at a velocity of U = 12 m/s with a back spin of angular velocity w as show in Fig. E9.16. What is the value of w if the ball is to travel on a horizontal path, not dropping due to the acceleration of gravity? (30%)

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1. A table tennis ball weighing 2.45´ 10²N with diameter D= 3.8´ 10² m is hit at a velocity of U = 12 m/s with a back spin of angular velocity w as show in Fig. E9.16. What is the value of w if the ball is to travel on a horizontal path, not dropping due to the acceleration of gravity? (30%) 0.8 C, = 0.6 D– Smooth sphere 0.4 C = 0.2 UD Re = = 6 x 104 1 2 3 4 @D/2U
Transcribed Image Text:1. A table tennis ball weighing 2.45´ 10²N with diameter D= 3.8´ 10² m is hit at a velocity of U = 12 m/s with a back spin of angular velocity w as show in Fig. E9.16. What is the value of w if the ball is to travel on a horizontal path, not dropping due to the acceleration of gravity? (30%) 0.8 C, = 0.6 D– Smooth sphere 0.4 C = 0.2 UD Re = = 6 x 104 1 2 3 4 @D/2U
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