An ice skater with moment of inertia 70.0 kg•m2 is spinning at 41.0 rpm. If the...

Question

Question

An ice skater with moment of inertia 70.0 kg•m2 is spinning at 41.0 rpm. If the

skater pulls in her arms, her moment of inertia decreases to 50.0 kg•m2. What is

the skater’s resulting angular velocity?

science physics

Answer 1

Answer #1

apply angular momentum conservation

Li = Lf

70*41 = 50 *w

w = 70*41/50 = 57.4 rpm

or 57.4 *2pi /60 = 6.01091394 rad/s

Goodluck for exams Comment in case any doubt, will reply for sure..

Answer 2

Similar Homework Help Questions

An ice skater has a moment of inertia of 5.0 kg-m^2 when her arms are outstretched....

An ice skater has a moment of inertia of 5.0 kg-m2 when her arms are outstretched. At this time she is spinning at 3.0 revolutions per second (rps). If she pulls in her arms and decreases her moment of inertia to 2.0 kg-m2, how fast will she be spinning? A) 7.5 rps B) 8.4 rps C) 2.0 rps D) 10 rps E) 3.3 rps
Calculate the angular momentum, in kg · m2/s, of an ice skater spinning at 6.00 rev/s...

Calculate the angular momentum, in kg · m2/s, of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.330 kg · m2. (a) Calculate the angular momentum, in kg . m/s, of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.330 kg . m2. kg. m/s (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his...
An ice skater is spinning at 6.8 rev/s and has a moment of inertia of 0.24...

An ice skater is spinning at 6.8 rev/s and has a moment of inertia of 0.24 kg ⋅ m2. Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.8 rev/s. He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate of rotation decreases to 1.25 rev/s. Suppose instead he keeps his arms...

Problem 19: sig.gif?tid=2N74-D1-D6-44-AC90-13475 An ice skater is spinning at 6.2 rev/s and has a moment of inertia of 0.36 kg ⋅ m2.

Problem 19: An ice skater is spinning at 6.2 rev/s and has a moment of inertia of 0.36 kg ⋅ m2.Part (a) Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.2 rev/s. Part (b) He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate of rotation decreases to 0.75 rev/s. Part (c) Suppose instead he keeps his...
(a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment...

(a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.400kg⋅m20.400kg⋅m2 (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia if his angular velocity decreases to 1.25 rev/s. (c) Suppose instead he keeps his arms in and allows friction of the ice to slow him to 3.00 rev/s. What average torque was exerted...
An ice skater is spinning at 2.5 revolutions per second and has a moment of inertia...

An ice skater is spinning at 2.5 revolutions per second and has a moment of inertia of 0.85 kg m2. Estimate her rotational angular momentum, assuming for simplicity that she can be approximated as a rigid, axially-symmetric body.

4. An ice skater with rotational inertia I = 0.23 kg*m* is spinning with angular speed...

4. An ice skater with rotational inertia I = 0.23 kg*m* is spinning with angular speed w. They pull their arms in, increasing their angular speed to 4w. What is the final moment of inertia?
(a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment...

(a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.300 kg · m2. _____kg · m2/s (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia if his angular velocity drops to 1.75 rev/s. ______kg · m2 (c) Suppose instead he keeps his arms in and allows friction with the ice to...
An ice skater is spinning at 5.2 rev/s and has a moment of inertia of 0.56...

An ice skater is spinning at 5.2 rev/s and has a moment of inertia of 0.56 kg ⋅ m2. (9%) Problem 9: An ice skater is spinning at 5.2 rev/s and has a moment of inertia of 0.56 kg. m². > A 33% Part (a) Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 5.2 rev/s. Grade Summary Deductions 0% Potential 100% L = 1 E sin() cos() tan() cotano asino acos atan...

(a) Calculate the angular momentum (in kg.m2/s) of an ice skater spinning at 6.00 rev/s given...

(a) Calculate the angular momentum (in kg.m2/s) of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.470 kg.m2 kg-m2/s (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kg m-) if his angular velocity drops to 1.00 rev/s. kg-m2 (c) suppose instead he keeps his arms in and allows friction with the ice to slow...