A particle is projected with velocity 50 m/s at an angle 60o with the horizontal from the ground The - Physics - Motion In A Plane

Question

A particle is projected with velocity 50 m/s at an angle
60o with the horizontal from the ground The time after
which the velocity will make an angle 45o with the
horizontal is
( a) 2 5 s
( b)1 83s
( c)2 37s
( d)3 72s

Ved Prakash Lakhera · Accepted Answer

According to the given question         u cosθ=v cosϕi
 e
      50 cos60°=v cos45°or         v=50 cos60° cos45°=50×1×22×1=252 m/sLet after time t v=252 m/s is the velocity acquired
So              v sin45°=u sin60°-gti
 e
               252×12=50×32-9
8tor                  25=253 -9
8tor                  t=253-19
8=25×0 7329 8=1
83sTherefore the correct answer is option b1
83s

A particle is projected with velocity 50 m/s at an angle 60o with the horizontal from the ground. The time after which the velocity will make an angle 45o with the horizontal is ( a) 2.5 s ( b)1.83s ( c)2.37s ( d)3.72s

A particle is projected with velocity 50 m/s at an angle 60^o with the horizontal from the ground. The time after which the velocity will make an angle 45^o with the horizontal is
( a) 2.5 s
( b)1.83s
( c)2.37s
( d)3.72s