Question

A cork on a string takes 0.10 s to travel around a circle with 0.4 m radius. How fast is the cork moving?​

Answer 1

Answer:

8π m/s = 25.13 m/s

Explanation:

By how fast it means speed of the cork

Now distance travelled by cork in one round

= 2πr = 2π× 0.4 (circumference of the circle)

time taken to do so = 0.10sec

Therefore, speed of cork = 2π×0.4/ 0.1 = 8π m/s

= 25.13 m/s