- #1
Abarak
- 28
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Question
A 54.0kg ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5m. Biometric measurements indicate that each hand typically makes up about 1.25% of body weight.
Hand breakdown:
m = .675kg
r = .75m
[tex]\omega = 2.50\frac{rev}{s} = 15.707\frac{rad}{s}[/tex]
F = 125N
Part A:
What horizontal force must her wrist exert on her hand?
I figured this one out by using [tex]F=m*r*\omega^2[/tex]
Part B:
Express the force in part (a) as a multiple of the weight of her hand.
My Problem:
I am getting confused with "as a multiple". Pardon my lack of knowledge but I have no idea what they are asking for? I know the answer box is looking for a unit of weight (w).
Sorry about the "easy" question and thank you for taking time in reading my post.
-- Abarak
A 54.0kg ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5m. Biometric measurements indicate that each hand typically makes up about 1.25% of body weight.
Hand breakdown:
m = .675kg
r = .75m
[tex]\omega = 2.50\frac{rev}{s} = 15.707\frac{rad}{s}[/tex]
F = 125N
Part A:
What horizontal force must her wrist exert on her hand?
I figured this one out by using [tex]F=m*r*\omega^2[/tex]
Part B:
Express the force in part (a) as a multiple of the weight of her hand.
My Problem:
I am getting confused with "as a multiple". Pardon my lack of knowledge but I have no idea what they are asking for? I know the answer box is looking for a unit of weight (w).
Sorry about the "easy" question and thank you for taking time in reading my post.
-- Abarak