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

label Physics
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schedule 1 Day
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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!

Relevant equations Δd=V(Δt) + 1/2 (a)(Δt)^2 3.
I have found the time using the quadratic equation for part a which is 0.36s, but I am stuck on part b. I do not understand how to do it. It seems like Δd is the same in both parts. How in hell do I find Δt for part b.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 21st, 2015

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Oct 3rd, 2015
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Oct 3rd, 2015
Jun 26th, 2017
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