Q67 / 90 · JEE Main 2023 (31 Jan Shift 2) · Physics

A body is moving with constant speed, in a circle of radius $10 m$ . The body completes one revolution in $4 s$ . At the end of $3 r d$ second, the displacement of body (in $m$ ) from its starting point is:

A
$30$
B
$15 π$
C
$5 π$
Correct answer
D
$10 \sqrt{2}$

Solution

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

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

$\Rightarrow d = 10 \sqrt{2} m$

Hence, the correct answer is option: 'D'.

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A body is moving with constant speed, in a circle of radius 10 m. The body completes one revolution in 4 s. At the end of 3rd second, the displacement of body (in m) from its starting point is:

Solution

Relevant Questions

A body is moving with constant speed, in a circle of radius $10 m$ . The body completes one revolution in $4 s$ . At the end of $3 r d$ second, the displacement of body (in $m$ ) from its starting point is: