Question

State whether true or false.

The angular displacement of an object moving in a circular path of radius r is equal to ${90}^{\circ }$ when it has completed half a revolution.

• A. True
• B. False

Answer 1

The correct option is B False

When an object has completed half a revolution moving in a circular path, it has swept an angle of half that of a full circle.

Now a full circle covers an angle of 360${}^{\circ }$ or 2$\pi$ radians

Hence, the object covers an angular displacement of 180${}^{\circ }$ or $\pi$ radians