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A rock twirled on a thin string in a vertical
circle. As you look at the twirling rock,
imagine a clock face superimposed, where
the top of the circle is 12 o'clock, the bottom
is 6 o'clock, etc.
When the rock is at 9 o'clock, which forces
point which direction?
CHOOSE TWO.
Fg up
Tension down
Tension up
O Tension left
Fg down
Tension right

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