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10 questions from this quiz
They conserve it, keeping it constant
Friction
The object gains energy
vA=vBv_A = v_BvA=vB
ΔEk\Delta E_kΔEk
98 J
17.4 m
9.90 m·s−1^{-1}−1
180°180°180°
It's perpendicular to motion
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