Created by StemPy LabNo external force acts on a system of particles. What can you say about its centre of mass?
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← A 4.0 kg trolley moves east at 3.0 m/s and a 2.0 kg trolley moves west at 1.5 m/s. What is the velocity of their centre of mass?A shell fired from a gun would land 1200 m away. At the top of its path it bursts into two equal halves. One half falls straight down and lands 600 m from the gun. Ignoring air, where does the other half land? →
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