A hoop (I = MR2) is rolling along the ground at 10 m/s. It comes to a hill and starts going up. Assuming no losses to friction, how far does it travel vertically up the hill before it stops?

a. 10 m
c. 5.1 m
b. 3.7 m
d. 7.7 m


A

Physics & Space Science

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Suppose you live at latitude 40ºN. Which of the following describes the path of the celestial equator through your sky?

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Graphical Addition: If three vectors add to zero, they must all have equal magnitudes.

A. True B. False

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One _____ equals the distance to an imaginary star that has a parallax of 1 arc second

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