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CBSE Class 11-science Answered

A uniform beam of length L meters and weight M kg supports two unequal masses each of mass m1 and m2 respectively, balanced at the opposite ends of the seesaw. Calculate the normal force N exerted on the beam by the support, and develop the equations for net force and net torque for the system using equilibrium conditions for a rigid body.
Asked by Topperlearning User | 12 Aug, 2014, 08:13: AM
answered-by-expert Expert Answer

Let F­net and  be the net force and net torque on the system respectively.

The net force on the system is given by using first condition of equilibrium, that is F­net = N − (m­1g + m2g + Mg) = 0

Therefore the normal force N exerted on the beam by the support can be written as    N = m­1g + m2g +Mg  

The net torque on the system is given by using second condition of equilibrium, that is    
Answered by | 12 Aug, 2014, 10:13: AM

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