A projectile is projected at 10 ms -1 by making at an angle 60° to the horizontal. After some times its velocity makes an angle of 30° to the horizontal. Its speed at this instant is :

A projectile is projected at 10 ms -1 by making at an angle 60° to th

1.	A projectile is projected at 10 ms -1 by making at an angle 60° to the horizontal. After some times its velocity makes an angle of 30° to the horizontal. Its speed at this instant is :
Answer» `10/sqrt(3)` `10sqrt(3)` `5/sqrt(3)` 5sqrt(3)` SOLUTION :During projectile MOTION horizontal COMPONENT of force REMAINS the same. `:. Vcostheta=vcosalpha` `10xxcos60^@=vcos30^@` `:.V=(10xx1/2)/(sqrt(3)//2)`

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A projectile is projected at 10 ms -1 by making at an angle 60° to the horizontal. After some times its velocity makes an angle of 30° to the horizontal. Its speed at this instant is :

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