Question

give two real examples where displacement isnegetiveand velocity is negetive.

Answer 1

1) When we throw a ball in upward direction, acceleration is in downward direction, we take downward direction positively, and displacement and velocity is in upward direction so we can say that velocity and displacement are negative here.

2) We know friction force acts in the direction opposite to the motion of the body.
If we take direction of the force positive then velocity and displacement of the body are negative.