Question

A body is moving along a circular path of radius 7m. What are the distance travelled and displacement

Answer 1

Answer:

If by distance you mean how far did it travel, then it would be 3/4 of the circumference:

(.75)2πr = (.75)2π(0.7m) = 1.05π m = 3.3m

If by displacement you mean how far is it from its starting point, realize that that distance is the base of an isosceles triangle whose two other sides are formed by the radius of the circle. And since it is a right isosceles triangle, the two other angles are 45° each, meaning that the displacement if the hypotenuse and is equal to the radius times the square root of 2.

D = (0.7m)√2 = 0.99m

Explanation:

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