Most Important Selected Qs for JEE AdvancedPhysicsLaws of Motion
Paragraph A particle is suspended by three equal strings, of length a, from three points forming an equilateral triangle of side 2 b , in the horizontal plane. Question The tension in the string will be
Options
- A3 m g a 3 (3 a^2-4 b^2 )
- Bm g a 3 (3 a^2-4 b^2 )
- C3 m g a (4 a^2-3 b^2 )
- Dm g a (4 a^2-3 b^2 )
Correct answer
B. m g a 3 (3 a^2-4 b^2 )
Step-by-step solution
30^ = b (B O) = 3 2 B O= 2 b 3 Let P be particle clearly, aligned & 3 T₁ =m g & T₁= m g 3 = m g a 3 (3 a^2-4 b^2 ) aligned