1usin30=90.vertical comp. of vel.
-150=-usin30t+1/2gt^2.
calculate t using above eqn.
ucos30t is the horizontal dist. traveled .
a projectile is fired from the edge of a 150 m cliff with a horizontal velocity of 180m/s at angle of 30° with the horizontal , negelcting air resistane ans the followin
1.the horizontal distance from the gun to the point where the projectile will stike the ground
2. is the time taken by the projectile to strike the ground independent of the height that it attains above the cliff??? i.e. is time period independent of H1
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