Question

If a cycloid is made for the half rotation of circle of diameter 20 mm . The line on which circle rotates will be of length rounded to next whole number​

Answer 1

Answer:

the answers 31 is correct

Answer 2

Answer:

The answer is 31 mm.

Explanation:

Cycloid is a curve traced along a point on the circumference of a circle as the circle rotates on a straight line.

Given, the circle has completed half rotation.

Diameter of the circle, d = 20 mm

Hence, radius of the circle, r = d/2 = 10 mm

Since, the circle has done half rotation, half of the circumference of circle has traced the line.

Hence,

Length of the line = half the circumference of circle

= $\pi$r = 31 mm

Hence, the answer is 31 mm.

#SPJ3