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OpenStudy (anonymous):
A roller coaster cart of mass m = 380 kg starts stationary at Point A, where h1=21.3 m and a while later is at Point B, where h2=10.5 m. The acceleration of gravity is 9.8 m/s^2. What is the speed of the cart at Point B, ignoring the effect of friction? Answer in units of m/s.
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