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Anshul Jain Grade:
        

If the eq of trajectory of a projectile is given, how to find the time of its flight. For eg if eq of trajectory is y=ax -bx2 where y is height n x is horizontal dist from the pt of projection, how to get d time of flight??

7 years ago

Answers : (1)

Nitin Kushawaha
16 Points
										

Consider @ as Theta


The motion of trajectory is y=xtan@ - (1* g*x2) / 2 * u2cos2@


So, x = ucos@ *t  -- eqn.(1)


also, from eqn(1), we get


x / ucos@ = t;


so in the equation of trajectory, x2/u2cos2@ = t2


putting t2 in the equation of the trajectory we get,


y = xtan@ - (1/2 * g * t2)


also,  xtan@ = x* usin@/ucos@


solve like this u will get...

7 years ago
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