Answer:
Hi, There! your Answer is Below!
10.29 m/s
Explanation:
a = -9.8
v = Vi - 9.8 t
h = 0 + Vi t - 4.9 t^2
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at the top, t = .3 + 1.5/2 = 1.05
and v = 0 = Vi - 9.8(1.05)
so
Vi = 9.8(1.05) = 10.29 m/s
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The initial velocity will be = u = 36.75 m/s
That describe the motion of point , bodies , and system of bodies without considering the force that cause them to move.
let that window at height h
it took 3 sec to reach that window and after crossing that window it took 1.5 second to come back to that same window
this implies , total time taken to to get to the top = 3sec + 1.5/2 = 3.75 sec
using equation of motion :
v = u + at
v= final velocity =0(at top )
u = initial velocity =?
a = acceleration , a=g ( acceleration due to gravity) = 9.8 m/s^2
t= 3.75 sec
0 = u - 9.8(3.75)
u = 36.75 m/s
initial velocity will be = u = 36.75 m/s
learn more about kinematics equations of motion
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