Question

Is Where intial velosity always positive?any time u is negative ?what is the situation?please answer me .

Answer 1

Answer:

u can be negative.

Explanation:

Velocity is a vector quantity ie it is speed with direction.

Imagine you are playing with a ball and throw it in the downward direction. By convention, we take up as +ve and down as -ve. If we throw the ball downwards, u will be -ve because it's direction is -ve.