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Question
A particle moving with velocity $$bar{V}$$ is acted by three forces shown by the vector triangle PQR. The velocity of the particle will :
A
Increase
B
Decrease
C
Change according to the smallest force
D
Remain constant
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Solution
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Correct option is C. Remain constant As forces are forming closed loop in same order So, $$\vec{F}_{net} = 0$$ $$\Rightarrow m \dfrac{d \vec{v}}{dt} = 0$$ $$\Rightarrow \vec{v} $$ = constant
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