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Q.

The displacement time graph for two particles ,A and B arc straight lines inclined at angles of 30° and 60° with the time axis. The ratio of the speeds vA : vB is:

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a

1:3

b

1:3

c

3:1

d

1 :2

answer is D.

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Detailed Solution

vAvB=tan30otan60o=1/33=13

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