Question

Two uniform circular disc of radii 4cm and 2 cm respectively are attached .The centre of mass of the system from c1 is

Answer 1

Answer:

Explanation: r_{com} = \frac{m_{2}r }{m_{1+m_{2} } }\\

r = 4+2 = 6cm

uniform disc

Hence, surface density will be same(d)

mass(m) = surface density*area

                =d*A

r_{com} = \frac{m_{2}r }{m_{1+m_{2} } }\\