1. compare these objects:
object alpha is a hoop of mass 55kg and radius .24m;
object bravo is a disk of mass 86kg and radius .24m;
object charlie is a sphere of mass 112kg and radius .24m.
a) calculate the rotational inertias of each object?

|hoop |disk |sphere
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b) which object would win a race down an inclined plane?

I = 3.168

I = 2.48

I = 2.58

Charlie

Object Alpha is a hoop of mass 55kg and radius 0.24m

Formula to use

I = (m)(r)(r)

I = 55(0.24)²

I = 3.168

Object Bravo is a disk of mass 86kg and radius .24m

Formula to use

I = 1/2(m)(r)(r)

I = 1/2(86)(0.24)²

I = 2.48

Object Charlie is a sphere of mass 112kg and radius .24m

Formula to use

I = 2/5(m)(r)(r)

I = 2/5(112)(0.24)²

I = 2.58

As solid(sphere) object will always roll down the ramp faster than a hollow(disk, hoop) object of the same shape so Charlie will win the race down the incline plane

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

a is the best answer your welcome