Question

What will the movement of a point which is on the surface of a circle touching the ground at the same time, if the circle turns 210 degree by moving forward? The radius of he circle is 50cm.

Answer 1

183.26cm

Explanation:

Radius of the Circle = 50cm

Let the point be at A

It turns forward 210 degrees to B.

Therefore, the central angle subtended by the arc AB = 210 degrees

The movement of the point from A to B will be the length of the arc AB.

`\text{Length of an arc }=(\theta)/(360) * 2\pi r \\$Therefore, the distance moved forward$\\=(210)/(360) * 2*\pi * 50\\\\=183.26$ cm`