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Two particles A and B are performing SHM...

Two particles A and B are performing SHM along same straight line with same amplitude a and same angular frequency `omega`. At `t=0` A is at the left extreme and B is at a distance `a//2` from mean position to the right of mean position and moving toward mean position. THen:

A

Time after which ball strike the gorund is 4 sec

B

Ball comes to a height of `20m` again after 3 sec.

C

Value of `beta` is `tan^(-1)((5sqrt(3))/9)`

D

Value of D is `60sqrt(3)m`

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