If the athelte reaches back to the same corner after running on the track once, find the magnitude of displacement of the athlete.

On a square track of edge length 100 m, an athlete starts from one corner and reaches diagonally opposite corner. Find the distance and the magnitude of displacement of the athlete.

A circular track is made on which an thelete has to cover three rounds to complete a 1000 m run. During the run find the distance and magnitude of displacement of the athlete.

An athlete completes 100m race on a straight track. Calculate the distance and magnitude of displacement of athlete during the race.

A cricket ball is thrown up. It reaches a height 10 m from the point of throw and then reach back to the point of throw. Find the distance and displacement of the ball.

On an open ground, a motorist follows a track that turns to his left by an angle of 60^@ after every 500 m. Starting from a given turn, specify the displacement of the motorist at the third, sixth and eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case.

Shown in the figure four point charges at the corners of a square of side 2 cm. Find the magnitude and direction of the electric field at the centre O of the square, if Q = 0.02 muC Use 1/(4piepsilon_0) = 9 xx 10^9 N m^2 C^-2