In a stunt, three people jump off a platform and fall 9.9 m ontoa large air bag. A fourth person at the other end of the air bag, the“flier,” is launched 17 m vertically into the air. Assume all fourpeople have a mass of 75 kg. (a) What fraction of the mechanical energy of the three jumpers is transferred to the mechanicalenergy of the flier? (b) What is the total momentum of the threejumpers just before they land on the air bag? Let upward be thepositive direction. (c) What is the momentum of the flier just afterlaunch? (d) Notice that momentum is not conserved during thisstunt, unless you include the Earth. What impulse is delivered tothe jumpers–flier system by the Earth at the instant of the launch?

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