If the collision is elastic, how many equations of constraint do we have on those quantities?

A. Zero
B. One
C. Two
D. Three
E. Four


D. Three

Physics & Space Science

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Indicate whether the statement is true or false

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A 1500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 14 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)

a. 0.18 c. 0.28 b. 0.30 d. 0.38

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A flywheel with a moment of inertia 6.00 × 106 kg?m2 is spinning with an angular speed of 120 rev/s about a vertical axis while it sits at the north pole. The disk is turning counterclockwise when viewed from above

The disk is brought to a rest. Treat the earth as a uniform sphere with a mass 5.976 × 1024 kg and a radius 6.374 × 106 m. (a) What will be the magnitude of the change in angular momentum of the earth? (b) What will be the change in length of a day on Earth?

Physics & Space Science