Phil and his rocket-powered sled have a combined mass M and accelerate at a rate a. Then the sled runs into Zephram, mass m, who tumbles aboard. Ignore friction.
a. Show that the sled now accelerates at a rate equal to (equation).
b. If Phil and his sled have a combined mass of 70 kg, Zephram’s mass is 45 kg, and the initial acceleration of the sled was 3.6 m/s2, show that when Zephram joins Phil the acceleration of the sled is 2.2 m/s2.
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