PLEEASE HELP GRADE 12 PHYSICS UNIVERSITY LEVEL

Physics
Tutor: None Selected Time limit: 1 Day

1.      A baseball is thrown by Joey from the third floor of his home at 20.0m/s [downwards], his friend Timmy is 3.5 m below him.

a.       Find how long it takes the ball to reach Timmy.

b.      What velocity does the ball hit Timmy?

Oct 3rd, 2015

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

-3.5 = -20*t-1/2gt^2 

4.9t^2+20t-3.5 =0 

t= 0.168s

V = V0-9.8*t = -20-1.65 = -21.65



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

what about a question like this...

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.


Sep 21st, 2015

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Oct 3rd, 2015
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Oct 3rd, 2015
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