Practice Points To Ponder (6.14) - SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

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6 sample questions

Question 1.
Define center of mass.
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Think about balance and distribution.
Question 2.
What does equilibrium mean in physics?
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Consider a seesaw example.
3Question 3.
What is the center of mass?
- A measure of force
- An average position of mass
- The highest point of an object
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Think of balancing the object.
4Question 4.
True or False: The center of mass moves in response to internal forces.
- True
- False
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Consider interaction between particles.
Question 5.
A solid disk rotates about its center. If the radius is doubled while keeping the mass constant, what happens to the moment of inertia?
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Recall the formula for moment of inertia.
Question 6.
Consider a tightrope walker shifting from one side to the other. Calculate the change in their center of mass if their weight is 70 kg and they move 0.5 m horizontally.
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Think about how the distribution of weight changes.

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