A 85.3 kg ice skater is moving at 4.38 m/s
when she grabs the loose end of a rope, the op-
posite end of which is tied to a pole. She then
moves in a circle of radius 0.564 m around the
pole.
Find the force exerted by the rope on her
arms. The acceleration of gravity is 9.8 m/s2 .
Answer in units of kN

Question

A 85.3 kg ice skater is moving at 4.38 m/s
when she grabs the loose end of a rope, the op-
posite end of which is tied to a pole. She then
moves in a circle of radius 0.564 m around the
pole.
Find the force exerted by the rope on her
arms. The acceleration of gravity is 9.8 m/s2 .
Answer in units of kN

anonymous · Answer

|dw:1349481863357:dw|
Can you figure what the answer now?

anonymous · Answer

maybe if i see the formula

anonymous · Answer

Force on skater's arm is centripetal force that makes her move in circle with speed 4.38 m/s.

anonymous · Answer

$$F=\frac{mv^2}{r}$$

anonymous · Answer

i tried that the solution i got was 2901.470426 but the computer said it was incorrect

anonymous · Answer

Do you put your ans in kN? (2.9 kN)

anonymous · Answer

i didnt thank u

anonymous · Answer

try g=v^2/r the mass shouuld cancel

anonymous · Answer

i got it thanks