Question

In the shown figure blocks A and B are 1kg each and surfaces are all smooth.Spring constant is k=60N/cm.The system is in equilobrium.The minimum mass of block C for which when block C is suddenly removed the block A leaves contact from support is

Answer 1

Answer :-

→ 75/100 or 075

Explanation :-

Le theta is @ ,

For block A

Time of flight t ' = 2u sin@/g ......(1)

For block B

Time of flight t = 2 u cos@/g ....(2)

Now ,

We know that ,Range = 480

→ u^{2} sin 2@/g = 480

→ sin 2@= 0.96

→ @ ( theta) ~ 36.86 or in round 37°

therefore ,

Ratio of time of flight of both is

→ sin@/ cos @ = tan @

→ tan 37° = 0.75