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=ugt
0=89.8t
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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