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Q.

The displacement time graphs of two moving particles make angles of 30°and45° with the x – axis. The ratio of the two velocities is

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a

3:1

b

1:2

c

1:3

d

1:1

answer is D.

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Detailed Solution

Slope=[tanθ]ofst

Graph gives velocity

θ1=30°,θ2=45°

v1v2=tanθ1tanθ2

=tan30°tan45°

=1/31=13

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