Please help me answer d). and Can you check and see if my answers are correct? I

Question

Please help me answer d). and

Can you check and see if my answers are correct? I'm not sure if i solved them correctly.

I will rate your work as soon as I see it. Thanks in advance

A diver is 1.6 meters tall and has a mass of 60kg.

a) Appoximating the diver as a rod of length 1.6m rotating around its center, estimate the diver's rotational inertia when she is stretched out.

I= ml^2/12, 60*(1.6^2) / 12 = 12.8

b) The diver goes into the tuck position. Appoximating as a solid sphere of radius 0.4m, estimate the diver's new rotational inertia in the tuck position.

I= 2m(r^2)/5, 2(60)*(0.4^2)/5 = 3.84

c) The diver begins rotating in the position at a rate of 4 revolutions per second. When she stretches out, determine her new rotational speed.

3.84 * 4 / 12.8 = 1.2

d) Explain why it is easiest for divers to somersault in the tuck position, less easy in the "pike" position (leg straight), and hardest in the "layout" position (body fully extended).

Ans: this is because their moment of inertia is greatest in layout position and least in pike position

Explanation / Answer

all are correct

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