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An object is displaced by 2 Meters when a force of 50N is appled on it . Find the work done on the object |
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Answer» Answer: A force of 100N acts on a body of mass 2kg for 10s. What is the change in MOMENTUM of a body? Mobile RECHARGE on Amazon. A force of 100 N acts on a body of mass 2 kg for 10 s. What is the change in momentum of the body? According to Newton's Second Law of Motion, “ The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction of the force. By choosing ONE unit of force to be a force which produces an ACCELERATION of one unit in a body of mass one unit, the constsnt of proportionality becomes 1, and the above law gives the equation, F = ( m v - m u)/ t, where, F = appled force, u = initial velocity, v= final velocity, t = time for which the force acts on the body of mass m, changing its momentum from m u to m v. Accordingly, m v - m u = change in momentum= F × t In the present case force F = 100 N, and it acts on the body for 10 s, therefore Change in momentum of the body= 100 N ×10 s= 1000 Ns. |
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