A particle moves in a plane from $A$ to $E$ along the shown path. It is given that $AB=BC=CD=DE=10 \mathrm{m}$. Then magnitude of net displacement of particle is

A body on an inclined plane slides down $\frac{1}{4}th$ of distance in 2 seconds. It will slide down the complete distance along the plane in (the inclined plane have zero friction)

A car moving along straight line covers $\frac{1}{5}th$of total distance with speed $v_1$ and remaining part of distance with speed$v_2$ . The average velocity of car over entire distance is

The minimum distance between the start and finish points of the motion of an object is called the _____ of the object.