Two wheels have the same mass and radius of 4.4 kg and 0.48 m, respectively. one has (a) the shape of a hoop and the other (b) the shape of a solid disk. the wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. each turns through an angle of 14 rad in 8.0 s. find the net external torque that acts on each wheel.

1)

2)

Explanation:

Using the second equation of angular motion we have

Since the wheels start from rest we ahve

Applying the given values in the equation we have

Now by newton's second law of motion in angular motion we have

1) For Hoop We have

Thus  

2)For disc We have

Thus  

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.