A body is allowed to fall freely , and it reaches the ground with a velocity of 28 m/s calculate the height


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please provide the time in comment box.
time should be found too only acceleration due to gravity is given (g=10m/s)
only height is asked
now reload and select any best answer
your answer is 39.8m,and u hav to find the time additionally( t =2.85sec)

Answers

  • Brainly User
2014-03-25T21:08:50+05:30
It can be calculated
v^2-u^2=2gh
free fall so u=0 v=28 m s^-1
28^2=2(10)h
h=39.2 m
gt=v
t=2.8s
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Thanks for providing me with the time computation
2014-03-25T21:10:28+05:30
Given :
velocity  v = 28 m/s
v= gt
t =v/g
  = 28/10
   = 2.8 sec
we know  h = 1/2( g* (t* t) )
let t = 2.8 sec
 h =  1/2 (10 ) ( 2.8 ²)
 h = 39.2 m
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