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Grade: 12th pass
        
A rocket  is fired  vertically  and  ascends  with  a constant vertical acceleration   of 20 m/s2   for 1.0 min. Its fuel is then all used and  it continues   as  a free-fall   particle.   (a)  What  is the  maxi- mum  altitude  reached?  (b) What  is the total time elapsed  from take off  until  the rocket  strikes  the Earth?  (Ignore  the variation of g with  altitude). 
2 years ago

Answers : (2)

Sooryakiran
25 Points
							a) s=1/2at^2      =1/2 x 20 x 60 x 60      =36 kmB) t = time to go up + time to reach zero speed under gravity + time to fall free from that altitude.
						
2 years ago
Soumith Chowdary
48 Points
							Use S=ut+1/2at^2 here S=1/2x20x60x60 S =36000 t=60+60 t=120s because time of ascent =time of descent. u=0
						
2 years ago
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Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


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