Question

Please help?

Answer 1

oops - i got that wrong

height above ground = ut + 0.5gt^2 + 2
u = 100 g = -9.8 ( acceleration due to gravity) and t = time
so we have

h = 100t -4.9t^2 + 2

Answer 2

to find height after 2 second plug in t = 2 in the above equation

Answer 3

part c

height is on the ground so = zero

so 0 = 100t - 4.9t^2

solve for t

Answer 4

Thanks so much!

Answer 5

yw