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A rocket is launched with velocity 10 km/s. If the radius of earth is R, then maximum height attained by it will be (a) 2R (b)3R (ć)4R (d) 5R

A rocket is launched with velocity 10 km/s. If the radius of earth is R, then maximum height attained by it will be 
(a) 2R        (b)3R     (ć)4R    (d) 5R

Grade:12th pass

1 Answers

Sai
11 Points
5 years ago
KE of body=PE of body
1/2mv^2=mg(R+H)
Where H is maximum height
V^2=2g(R+H)
(10*5000/8)^2=20(R+H)
SINCE R=6.4*10^6
5R=R+H
H=4R
SOLVING WE GET
 

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