Series of physics questions on topics such as moment of inertia, angular momentum, units of force, gravitational potential energy, and energy transfer.

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The image contains a series of multiple-choice physics questions, likely from a homework assignment or exam. The questions cover topics such as moment of inertia, angular momentum, units of force, gravitational potential energy, and energy transfer.

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Here's a brief explanation for each answer:

50. Moment of inertia depends on mass distribution and axis orientation, not angular velocity.
51. Hollow cylinders have a greater moment of inertia because their mass is distributed further from the axis.
52. Radius of gyration (k = \sqrt{\frac{I}{m}}) . For a disc, (I = \frac{1}{2}mr^2), so (k = r/\sqrt{2} = 1/\sqrt{2} \approx 0.707) m.
53. In the absence of external torque, angular momentum is conserved.
54. Angular momentum remains constant when no external torque acts on the system.
55. The SI unit of moment of force (torque) is Newton-meter (Nm).
56. GPE varies depending on altitude. Increase in speed does not directly affect GPE.
57. If the slope of a graph is zero and so the displacement, then the velocity is zero.
58. If no energy is lost, the decrease in GPE equals the gain in kinetic energy.
59. The energy transferred is equal to the change in potential energy mgh = 10N * 250m = 2500J.

Tips

Ensure you understand the definitions and units of each physics concept.

Sources

• Ch. 10 Conceptual Questions - College Physics | OpenStax - openstax.org
• Angular Momentum and Its Conservation | AP Physics C - Fiveable - library.fiveable.me
• 9.3 Dynamics of Rotational Motion: Rotational Inertia - pressbooks.bccampus.ca