Question

A particle is moving in a circle of diameter 6m. What is its displacement when it completes three and

half revolutions?
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Answer 1

Explanation:

displacement is shortest distance from origin to end

so

d = 2πr/3

= πr

= 3.14×6

= 18.84

#666

Answer 2

Given:

A particle is moving in a circle of diameter 6m.

To Find:

What is displacement when it completes three and a half revolutions?

Solution:

When a particle moves through a circle and makes one revolution, its displacement is zero, as it comes back to the initial point.

Therefore, its displacement when it completes three and  half revolutions, only displacement of half revolution will be counted.

So, displacement of half revolution $=\pi r = \frac{22}{7} *6=\frac{132}{7}$ m.