Q 1 :    

A particle moving with velocity v is acted by three forces shown by the vector triangle PQR. The velocity of the particle will          [2019]

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  • change according to the smallest force QR

     

  • increase

     

  • decrease

     

  • remain constant

     

(4)

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As per triangle law, F1+F2+F3=0 i.e., net force on the particle is zero. So, acceleration is also zero.

Hence velocity of the particle will remain constant.