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sachin singh Grade: 12
        

A tennis ball is thrown vertically upward with an initial velocity of +8.0 m/s.


(a) what will the ball\'s speed be when it returns to its starting point?


(b) how long will the ball take to reach its starting point?

7 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

ans a) speed of ball will be equal to the speed of projection....


ans b)  applying v = u +at


 at the topmost point v=0


        t=u/a =8/10 sec                   (  accleration a =-g)


t is the time taken by the ball to move to highest point


 so total time of flight is 2t


   T=16/10 =8/5 sec

7 years ago
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