A gun has a nozzle velocity 330 mt/sec. It has to meet a target which is at a distance 5km. It retards at a rate of 8 mt/sec/sec while travelling in air. Find the velocity at a place where the bullet will meet the target.

• according to the formulae v2-u2=2as
  here v=? u=330m/s,a=-8(retards at rate so we can take negative)
  s=5000m ....v^2=2as+u^2
  submit the above values in the formulae
  v^2=2*-8*5000+330^2=-80000+108900=28900
  v=170m/s
• 13 years agoHelpfull: Yes(20) No(0)
• v^2=u^2+2*(-a)*s we have taken -a in place of a due to retardation
  =>v=sqrt(330^2-2*8*5000) as 5km=5000m
  =>v=170m/s
• 13 years agoHelpfull: Yes(4) No(0)
• v^2=u^2-2as
  =330^2-2*8*5000
  =28900
  V=170
• 13 years agoHelpfull: Yes(2) No(0)
• v^2=u^2-2as
  =330^2-2*8*5000
  =22400
  =>v=149.66m/sec ANS.
• 13 years agoHelpfull: Yes(1) No(9)
• 170m/s. v^2= u^2+ 2as. here u=330m/s, a= -8m/s^2, s=5km.
• 13 years agoHelpfull: Yes(1) No(0)
• the equation of the speed is v^2+u^2=2as, here the value given is u=330m/sec,a=(-8m/sec^2) and s=5Km=5000m.Put the all vau in the equation and the answer come is v=170m/sec.
• 13 years agoHelpfull: Yes(0) No(1)
• 170m/s.
  
  v^2=u^2+2as
  here, we have to find v
  u=330m/s
  a=-8m/s^2
  s=5km=5000m
  then,
  v^2=330^2-2*8*5000
  =28900
  then, v=170m/s
• 13 years agoHelpfull: Yes(0) No(0)
• v^2=u^2-2as
  s=5000m
  
  v=170m/s
• 12 years agoHelpfull: Yes(0) No(0)