Aspool of thin wire (with inner radius r = 0.45 m, outer radius r = 0.60 m, and moment of inertia icm = 0.8208 kg·m2) pivots on a shaft. the wire is pulled down by a mass m = 1.300 kg. after falling a distance d = 0.500 m, starting from rest, the mass has a speed of v = 63.1 cm/s. calculate the energy lost to friction during that time.

Explanation:

The energy lost can be model by the energy equation in potential and kinetic energy in each step of the motion

Given: ,,,,

Kinetic energy:

,

Energy lost :

d

explanation:

i think the answer is d. but im not sure!

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.