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Using Forces to Predict Motion: Mastery Test
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Select the correct answer.
Tonya picks up a leaf from the ground and holds it at arm's length. She lets go, and the leaf falls to the ground. What force pulled the leaf to the
ground?
O A applied force
ОВ.
drag force
Oc gravitational force
OD
normal force
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Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b