Question

4. A particle is moving in a circle of
diameter 10m. The distance covered by it on completing 2 revolutions is 40m 20¶m 20√2m zero​

Answer 1

Given :

▪ Diameter of circular path = 10m

▪ No. of revolutions = 2

To Find :

▪ Distance covered by particle.

Concept :

↗ Distance is defined as the actual lengt of path that is covered by moving object.

↗ It is a scalar quantity.

↗ It has only magnitude.

↗ It can't be negative or zero.

↗ SI unit : m

Conversion :

✴ Radius = Diameter ÷ 2

✴ Radius = 10/2 = 5m

CalculatioN :

☞ Distance (d) = 2 × circumference

☞ d = 2 × 2πR

☞ d = 2 × (2×π×5)

☞ d = 2 × 10π

☞ d = 20π m