Question

state true or false (and explain for false statement) 1.a rigid body must be in equilibrium under action of 2 equal and opposite forces 2.as star collapses its angular velocity increases because the mass of star increases 3. a rotating body can be in stable and instable equilibrium because moment of inertia is always different for different axis of rotation 4.for the purpose of calculation of moment of inertia ,body's mass can be assumed to be concentrated at its centre of mass a. 1 and 2 b. 2 and 3 c.all d.none

Answer 1