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OpenStudy (anonymous):
What is the net force needed to accelerate a full grocery sack weighing 210 N upward at a rate of 1.5 m/s2?
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OpenStudy (loser66):
|dw:1380675827314:dw| F - W = m a find m, m = W/g = 210/9.8 = 21.43kg F= ma +W F = 21.43(kg)* 1.5 (m/s^2) + 210 N = 242.145N = 2.4 *10^2 N (2 significant figure)
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