1-D FREE FALL KINEMATICS, EASY QUESTION NEED HELP ASAP PLEASE

Physics
Tutor: None Selected Time limit: 1 Day

1.  Rob throws a baseball upwards at 14.2 m/s.  His friend, John, is sitting in a tree 4.5m above Rob.

a.  Calculate how long it will take to reach John.

b.  If John misses the ball as it moves upwards, how long will it take to reach John again.

Oct 3rd, 2015

Thank you for the opportunity to help you with your question!

 vf^2 = vi^2 -2 • a • d

0^2=14.2^2- 2 x a x 4.5

0 = 201.64-9a

9a=201.64

a= 22.4

v=v-at

0= 14.2 - 22.4t

22.4t=14.2

t=0.63 sec

for return

o.63x2=1.26sec


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Sep 21st, 2015

if any question let me help you here please

Sep 21st, 2015

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Oct 3rd, 2015
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Oct 3rd, 2015
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