Question

an object is dropped at a height 500 metre find its acceleration and velocity and time​

Answer 1

Answer:

Since the body is falling freely ,

Its initial velocity = 0

given ,

H = 500 m

[ Note : when an object falls freely , its acceleration will remain constant . The value of acceleration will be equal to the value of acceleration due to gravity. The value is 9.8 m/s² but if they give the value of g as 10 m/s² , dont use 9.8 m/s² as the value and vice - versa ]

H = ut + 1/2at²

   = 1/2gt²

500 = 1/2×10×t²

5t² = 500

t² = 500 / 5

   = 100

t = √100

  = 10 s

the velocity on reaching the ground is given by,

v = u+at

v = gt

  = 10×10

  = 100 m/s

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