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Category > Physics Posted 08 May 2017 My Price 5.00

skater spins

A 50-kg ice skater spins about a vertical axis through her body with outstretched arms. She makes 2 turns each second. The distance from one hand to the other is 1.60 m. Each hand makes up approximately 1.25% of the body weight.

  1. What horizontal force does her wrist exert on the hand?
  2. If she spins faster (3 turns each second), what is the percentage change of the force on the hand?

Show all work.

 

Ok, the above is my problem,

what I have so far is..

.625(mass)*12.57(angular velocity)/.8(radius)

 

To concerns, do I divide by radius? All the answers I looked up multiply by .8, but the formula clearly states m*v^2/r for force?

And do I convet kilograms to grams for this problem? Or just keep it kg all the way.

 

Thanks for your help, hope this all makes sense!

Answers

SuperTutor
(15)
Status NEW Posted 08 May 2017 06:05 AM My Price 5.00

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