Friction occurs when the surfaces and heat of two surfaces grind against each other.
I think these are the answers
Answer:
I = M R^2 is the moment of inertia about a point that is a distance R from the center of mass (uniform distributed mass).
The moment of inertia about the center of a sphere is 2 / 5 M R^2.
By the parallel axis theorem the moment of inertia about a point on the rim of the sphere is I = 2/5 M R^2 + M R^2 = 7/5 M R^2
I = 7/5 * 20 kg * .2^2 m = 1.12 kg m^2
Curvy lines with light glooming
Electric Energy = Current x Voltage x time = 207 x 9.4 = 1,945.8 J
