Question

This link is a page with the problems that i am working on, i don't even know where to being and i have no one to help, if someone could explain how i would begin to solve them it would be swell.

http://www.punchard.com/collalg/data/chap14/section06/problem_solving.pdf

Answer 1

The height at t = 1 sec:
y(t) = - 16t² + V₀ t sinθ
4.7 = - 16 + 25 sinθ
=> 25sinθ = 16 + 4.7
sinθ = ..
θ = ....

Answer 2

arc sin (20.7/25)

Answer 3

55.9

Answer 4

sorry i had to attend to something away from my computer

Answer 5

thank you for your help.