A body is moving with constant speed, in a circle of radius 10m ....

A body is moving with constant speed, in a circle of radius

10m

. The body completes one revolution in

4s

. At the end of

3rd

second, the displacement of body (in

m

) from its starting point is: A body is moving with constant speed, in a circle of radius 10m . The body completes one revolution in 4s . At the end

Options

A $30$
B $15\pi$
C $5\pi$
D $10\sqrt{2}$

Correct answer

D. $10\sqrt{2}$

Step-by-step solution

A body is moving with constant speed, in a circle of radius 10m . The body completes one revolution in 4s . At the end

Give: $r = 10m$ , $T = 4s$ .

Displacement is defined to be the change in position of an object. As we can see from the above figure, displacement will be $d = \sqrt{{r}^{2} + {r}^{2}}$

$⇒ d = 10\sqrt{2}m$

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