Question

A body completes one round of a circle of radius 'R
in 20 second. The displacement of the body after
45 second is
1) R/
$\ \sqrt{2}$
2)
$\sqrt{2} r$

3)
$2 \sqrt{r}$

4) 2R

​

Answer 1

Answer:

In 45 seconds the wheel of radius R will complete 45/20 = 2.25 revolutions. In 2 revolutions the wheel comes to its original position, hence its displacement will be zero

Explanation: