A ball rolls horizontally with a speed of 7.6 m/s off the edge of a tall platform. If the ball lands 8.7 m?

Question

from the point on the ground directly below the edge of the platform, what is the height of the platform? Thank you

Answer 1

Use the equations of motion
x(t)=7.6*t
and
y(t)=h-.5*g*t^2

when x(t)=8.7 solve for t and plug into y(t)=0 to solve for h

h=.5*9.8*8.7^2/7.6^2
6.4 m

j