请问这一题考古题如何解 the zacchini family was renowned for their human-connonball act in which a family member was shot from connon using either elastic bands or compr -essed air.in one version of the act,emanual zacchini was shot over three Ferris wheels to land in a net at the same hight as the open end of the ca -nnon and at a range of 69m.he was propelled inside the barrel for 5.2m and lauched at an angle of 53.if his mass was 85kg and he underwent constant acceleration inside the barrel,what was the manitude of the force propelling him？ --

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