Posted by **Taylor** on Thursday, April 16, 2009 at 4:21pm.

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

A) What will its speed be wheen it returns to its tarting point?

B) How long will it take for it to reach its starting poing?

- physical science -
**Aparna**, Sunday, May 29, 2011 at 10:05am
(A)Speed = 8m/s

(B)u=8m/s

v=0m/s

a=g=9.8m/s2

Use

v=u-gt

0=8-9.8t

9.8t=8

t=8/9.8

But this is the time required by the tennis ball to reach the highest point.

Time taken by the ball to return to the starting point=2t

=2*8/9.8

=8/4.9

=1.632s

- physical science -
**Angel Ontong**, Tuesday, December 6, 2016 at 4:19am
A volleyball is thrown vertically upward with an initial velocity of 7.5 m/s.

A.What will its speed be when it return to ita starting point?

B.How long will it take for it to reach its maximum height?

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