a ball is at rest on a platform and falls freely, hitting the ground in 1.1 seconds. What is the height of the platform?

Guest Sep 19, 2021

#1**+1 **

x_{f} = x_{o} + v_{o} t + 1/2 at^{2 }(I used x as a matter of convention.....but you can switch them to 'y' )

xf = final height= the ground = 0

xo = intitial position (what we are looking for)

vo = original velocity = 0

a = accelaration of gravity choose either -32.2 ft/s^{2} your answer will be in feet

or choose -9.81 m/s^{2}^{ }your answer will be in meters

t = time = 1.1 (given) Plug in the numbers and calculate.....

Guest Sep 19, 2021