A5.0 kg, 54-cm-diameter cylinder rotates on an axle passing through one edge. the axle is parallel to the floor. the cylinder is held with the center of mass at the same height as the axle, then released. (figure 1)what is the magnitude of the cylinder's initial angular acceleration? what is the magnitude of the cylinder's angular velocity when it is directly below the axle?

a) 24.2 rad/s² b) 6.95 rad/s

Explanation:

So the cylinder's moment of inertia is , where M is the mass of the cylinder and R is its radius.

The problem you have here is that the axle is modifying it, so we use the parallel axis theorem:

Therefore

where D is the distance from the center of mass to the axis which is a radius R

Next the Momentum with respect to the center of mass of the cylinder is

because there are no other forces rather than the cylinder's weight, now kg*m^2

a ) replace and find

b) we start by assuming that the energy is conserved because the cylinder is rolling without sliding:

so the potential energy is given by

now you have that the same amount is going to be equal to the kinetic rotational energy of the cylinder so

f=gm1m2/d^2 it d

f is force g is gravitaiton constant, m1 is mass of first object, m2 is mass of second object. d is distance between two object

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge