an iceskater initially spinning at angular speed 0.
an iceskater initially spinning at angular speed 0. 650 revolution/s, rotational inertia 2.20kg.m2. then the inertia reduced to 1.10kg.m2
a. determine initial angular speed
b. calculate final angular speed
c. show kinetic energy was not conserved during process
d. where did extra rotational kineticenergy come from?
Homework Answers
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a...
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a rotational inertia Ii = 2.30 kg.m2 with her arms extended. When she pulls her arms in, her rotational inertia is reduced to If=1.05 kg.m2 . Assume no external torques act. a) Determine her initial angular speed in rad/s. (1 marks) b) Calculate her final angular speed in RPM (4 marks) c) Calculate the period of rotation when she is at her final speed (1...
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a rotational inertia Ii = 2.30 kg.m...
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a rotational inertia Ii = 2.30 kg.m2 with her arms extended. When she pulls her arms in, her rotational inertia is reduced to If=1.05 kg.m2 . Assume no external torques act. a) Determine her initial angular speed in rad/s. (1 marks) b) Calculate her final angular speed in RPM (4 marks) c) Calculate the period of rotation when she is at her final speed (1...
An ice skater spinning with outstretched arms has an angular speed of 5.0rad/s . She tucks...
An ice skater spinning with outstretched arms has an angular speed of 5.0rad/s . She tucks in her arms, decreasing her moment of inertia by 29% . What is the resulting angular speed? rad/s By what factor does the skater's kinetic energy change? (Neglect any frictional effects.) where does the extra kinetic energy come from?
A figure skater is spinning on frictionless ice. Treat the figure skater as a sphere with...
A figure skater is spinning on frictionless ice. Treat the figure skater as a sphere with radius R=.4m and mass M=60kg. The skater is holding onto a massless string attached to a weighted ball of m=10kg. The skater is initially spinning at an angular speed w0 of 2pi radians per second (1 rev/s) with a sting radius of r=1m. Moment of inertia for a sphere is I=(2/5)MR^2. 1.) What is the initial total rotational inertia of the skater and ball?...
A fan with the moment of inertia of 4 kgm2 is spinning with an angular speed...
A fan with the moment of inertia of 4 kgm2 is spinning with an angular speed of 10 rad/s. What is its rotational kinetic energy in J
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?
Turntable question..
I hate turntable questions I can not understand this one atallConsider a turntable to be a circular disk of moment ofinertia rotating at a constant angular velocity around an axis through the center and perpendicular tothe plane of the disk (the disk's "primary axis of symmetry"). Theaxis of the disk is verticaland the disk is supported byfrictionless bearings. The motor of the turntable is off, so thereis no external torque being applied to the axis.Another disk (a record) is dropped...
#3 A merry-go-round full of kids initially has 5.33 kg-m^2 while maintaining an angular speed =...
#3
A merry-go-round full of kids initially has 5.33 kg-m^2 while maintaining an angular speed = 2.55 rad/s. Some kids move closer to the center of the merry-go-round increasing its speed to omega y = 3.00 rad/s What's the final inertia Ly? How do the final and initial kinetic energies compare: K_r > K_y K_d < k_1 or K_1 = K ? if they are different then where did the delta K go to or come from? A solid ball...
Please show all work A wheel is rotating freely at angular speed 600 rad/s on a...
Please show all work
A wheel is rotating freely at angular speed 600 rad/s on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with three times the rotational inertia of the first, is suddenly coupled to the same shaft. What is the angular speed of the resultant combination of the shaft and two wheels? What fraction of the original rotational kinetic energy is lost in the collision?
1) A uniform 14 kg cylinder turns on a horizontal axis with a significant amount of...
1) A uniform 14 kg cylinder turns on a horizontal axis with a
significant amount of friction. The cylinder has a radius of 0.030
m and a thickness of 0.080 m. It is initially at rest. Then a force
of 70 N is applied at a 37 angle for 2.0 s, as indicated in the
figure, and the cylinder accelerates. After a time of 2.0 s the
force is reduced to 24 N, and then the cylinder continues to spin...
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?
#3
A merry-go-round full of kids initially has 5.33 kg-m^2 while maintaining an angular speed = 2.55 rad/s. Some kids move closer to the center of the merry-go-round increasing its speed to omega y = 3.00 rad/s What's the final inertia Ly? How do the final and initial kinetic energies compare: K_r > K_y K_d < k_1 or K_1 = K ? if they are different then where did the delta K go to or come from? A solid ball...
Please show all work
A wheel is rotating freely at angular speed 600 rad/s on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with three times the rotational inertia of the first, is suddenly coupled to the same shaft. What is the angular speed of the resultant combination of the shaft and two wheels? What fraction of the original rotational kinetic energy is lost in the collision?
1) A uniform 14 kg cylinder turns on a horizontal axis with a
significant amount of friction. The cylinder has a radius of 0.030
m and a thickness of 0.080 m. It is initially at rest. Then a force
of 70 N is applied at a 37 angle for 2.0 s, as indicated in the
figure, and the cylinder accelerates. After a time of 2.0 s the
force is reduced to 24 N, and then the cylinder continues to spin...
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