JEE Main 2022 · 25 Jul · Shift 1 · Physics Q33

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PhysicsSingle correct+4 / -1Question 33 of 90

A person moved from A to B on a circular path as shown in figure. If the distance travelled by him is 60 m, then the magnitude of displacement would be :

(Given $\cos135°=-0.7$ )

Circle with centre O; A on the right end of a horizontal radius, B on the rim with angle AOB = 135°; an arrow shows motion anticlockwise from A to B.

42 m

47 m

19 m

40 m

Answer and worked solution

Official answer: B

Radius. $r\cdot\frac{3\pi}4=60$ , $r\approx25.5$ m.

Chord. $r\sqrt{2-2\cos135°}=25.5\sqrt{3.4}\approx47$ m.

(B)

Topics:Motion in a plane

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JEE Main 2022 · 25 Jul · Shift 1, Physics question 33