Physics Forces and Motion Ms. Goldamer Copy everything in red onto your class notes. Section 1 Summary. A reference point is an object that appears to stay in place. The Earths surface is a common reference point for determining motion. Section 1 Summary.
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reference point for
B)vf= 85, vs = 5 m/s, time = 40 sec
C) vf = 29, vs =2 m/s, time = 9 seconds
D) vf = 13, vs = 3 m/s, time = 2 seconds