Recent content by khzak1

-14.2 ± √113.35 -9.81 Δt=0.36s Δt=-2.53s

Well, you get 2 roots, but one is deemed useless because it is a negative.

Homework Statement [/B] 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. Homework Equations...

Something just came to my mind. What if there was a similar question, and I would get a positive integer either way. How would I know which time is correct according to ± ?

Haha, thanks mate ! :)

So the positive answer relative to time would be Δt=0.168s approximately I am not sure if that is the correct answer. Could you confirm it please.

Homework Statement 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. I used the quadratic formula to solve to time but I am confused about it in my calculations. Homework...

My name is Zak and I'm in grade 12 Highschool. Slacked of in grade 11 Physics , but I'm stepping up my game for grade 12 Physics.