Q. A cyclist starts from the centre 0 of a circular ground of radius 1 km, reaches the edge A of the ground and then travels along the circumference upto B and then reaches the centre along BO as shown in figure. If he takes 10 minutes to complete this journey, find (i) the net displacement,
(ii) average velocity and
(iii) averagof the cyclist.

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?