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31. For a system to be in equilibrium, the torques acting on it must balance. This is true only if the torques are taken about

(a) The centre of the system

(b) The centre of mass of the system

(c) Any point on the system

(d) Any point on the system or outside it

Ans. d

PrevPreviousA batsman hits a sixer and the ball touches the ground outside the cricket ground. Which of the following graph describes the variation of the cricket ball’s vertical velocity v with time between the time t1 as it hits the bat and time t2 when it touches the ground

NextThe graph between the resistive force F acting on a body and the distance covered by the body is shown in the figure. The mass of the body is 25 kg and initial velocity is 2 m/s. When the distance covered by the body is 4m, its kinetic energy would beNext

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