Question

Distinguish between distance covered and displacement of a body

Answer 1

Distance is a scaler quantity in which direction doesn't matter. It can never be zero or negative. Any body which chages its position with respect to time will surely cover some distance.

But in case of displacement the situation is different. Displacement is a vector quantity. It is determined both by direction and magnitude. It is a vector quantity. It can be zero negative or positive. An object covering some distance can have zero displacement.