A body is projected horizontall from a height of 78.4 m with a velocity 10 ms^(-1). Its velocity after 3 seconds is - [g = 10 ms^(-2)] (Take direction of projection on vec(i) and vertically upward direction on vec(j)).

A body is projected horizontall from a height of 78.4 m with a velocit

1.	A body is projected horizontall from a height of 78.4 m with a velocity 10 ms^(-1). Its velocity after 3 seconds is - [g = 10 ms^(-2)] (Take direction of projection on vec(i) and vertically upward direction on vec(j)).
Answer» `10 HAT(i) - 30 hat(J)` `10 hat(i) + 30 hat(j)` `20 hat(i) - 30 hat(j)` `10 hat(i) + 10 SQRT(3) hat(j)` Answer :A