Question

Class9 physics
A particle is travelling in a circle of
diameter 20m. Calcute distance
displacement after
and half round .
Please keep your answer clear and understandable with all steps

Answer 1

Answer:

The distance covered by the particle after half round is 31.4m

The displacement after half round is 20m.

Explanation:

Given a particle is travelling in a circle of diameter 20m

So, d=20m. Hence r=d/2= 10m

Suppose particle starts at initial i.

after hald round it reaches final f.

So total distance travel by the particle is half of the circumference of the circle.

We know circumference of circle is

$2\pi \: r$

So for half round , distance is

$\frac{1}{2} \times 2\pi \: r = \pi \: r$

So distance=

$3.14 \times 10m = 31.4m$

Now

we displacement is the shortest distance travel by the particle from initial position to final position.

Hence the shortest distance is diameter itself.

Hence the displacement is 20m.