The mass of a star is 1.4 × 10^31 kg and it performs one rotation in 26.3 day. Find its new period if the diameter suddenly shrinks to 0.55 times its present size. Assume a uniform mass distribution before and after.
I don't know what I am doing wrong here:
Iw(intial)=Iw(final)...
What is the magnitude of the tangential component of the linear acceleration of a particle that is located at a distance of 50 cm from the axis of rotation when the flywheel is turning at 78.0 rev/min?
I took 78 rev/min and converted it to rad/s and got 4.08 rad/s. I then multiplied that by...
A uniform, solid sphere of mass 3.2 kg and diameter 63 cm is rotating about its diameter at 230 rev/min. What is the kinetic energy of rotation?
230rev/min= 24.1 rad/s
I know that KE=1/2Iw^2 and interia of a solid sphere is I=2/5MR^2
I=(2/5)(3.2)(.63)^2
=.508032...