Question

I need help please :) I'm really bad a physics and I'm stuck with this worksheet :(
I'll fan and medal

Each year at a college, there is a tradition of having a hoop rolling competition. Alex rolls his 0.25 kg hoop down the course. If the hoop has a radius of 0.5 m, what is the moment of inertia of Alex’s rolling hoop?

A particular planet has a moment of inertia of 9.74 × 1037 kg•m2 and a mass of 5.98 × 1024 kg. Based on these values, what is the planet’s radius?

Jessica stretches her arms out 0.6 m from the center of her body while holding a 2 kg mass in each hand. She then spins around on an ice rink at 1.1 m/s.

What is the combined angular momentum of the masses?

If she pulls her arms in to 0.15 m, what is her linear speed if the angular momentum remains constant?

@ganeshie8 @zepdrix @Vocaloid @imqwerty @Whitemonsterbunny17
@spacemountain

Answer 1

start by posting a possible solution to part (a)

Answer 2

??

Answer 3

okay thanks

Answer 4

I'm not sure what to start with

Answer 5

Do you need help still?

Answer 6

@magicremix123 Yes please !

Answer 7

okay, let me write it out :)

Answer 8

I am having hard doing this myself...

Answer 9

okay thank you, yeah its tough

Answer 10

@irishBoy123 I'm not sure what to start with

Answer 11

for the first \(I = mr^2\)

Answer 12

what do i plug in for I?

Answer 13

plug m and r into the formula i posted. that's all :p