The horizontal turntable with a mass of 200g and a radius of 15cm rotates at an angular velocity of 5rad / s. a worm with a mass of 20g falls on the center of the turntable and crawls outward along the radial direction. The angular velocity of the turntable when the worm climbs to the edge of the turntable is calculated

The horizontal turntable with a mass of 200g and a radius of 15cm rotates at an angular velocity of 5rad / s. a worm with a mass of 20g falls on the center of the turntable and crawls outward along the radial direction. The angular velocity of the turntable when the worm climbs to the edge of the turntable is calculated

conservation of energy:
J1=MR^2/2=0.2*0.15^/2=2.25e-3 kg m^2
J2=J1+mR^2=2.7e-3 kg m^2
E1=1/2*J1*w1^2=E2=1/2J2w2^2
w2=4.56rad/s