Tuesday

March 31, 2015

March 31, 2015

Posted by **Eric** on Saturday, June 2, 2012 at 8:09pm.

(a) What is the radius of the circle they now skate in?

(b) What is the angular speed of the skaters?

(c) What is the kinetic energy of the two-skater system?

(d) Next, the skaters pull along the pole until they are separated by 0.7 m. What is their angular speed then?

(e) Calculate the kinetic energy of the system now.

- Physics -
**drwls**, Sunday, June 3, 2012 at 1:42am(a) 1.9 m

(b) w = V/R = 1.0 rad/s

(c) 55*(1.9)^2 Joules

(d) angular momentum is conserved and they speed up by a factor 3.8/0.7

(e) Do the numbers. Kinetic energy increases by a factor equal to the square of the velocity incorease factor.

**Answer this Question**

**Related Questions**

physics - In the figure, two skaters, each of mass 58.0 kg, approach each other ...

physics - Two skaters, one with mass 62 kg and the other with mass 45 kg, stand ...

Physics - Two skaters, one with mass 68 kg and the other with mass 47 kg, stand ...

Physics - A trapeze artist weighs 8.00 x 10^2 N. The artist momentarily held to ...

Physics - Two ice skaters, with masses of 30kg & 85 kg are at the center of a ...

physics - Two skaters with masses of 66kg and 47kg , respectively, stand 5.5m ...

physics - Two long, parallel wires carry current in the x-y plane. One wire ...

physics - Two long, parallel wires carry current in the x-y plane. One wire ...

Laws of Motion - Two skaters are in the exact center of a circular frozen pond. ...

physics - Two ice skaters stand at rest in the center of an ice rink. When they ...