Question: A mortar-style fireworks shell, launched vertically, must be detonated at a height of (100 mathrm{~m}). (a) If the shell is to detonate at the top

A mortar-style fireworks shell, launched vertically, must be detonated at a height of \(100 \mathrm{~m}\).

(a) If the shell is to detonate at the top of its trajectory, what must its launch speed be?

(b) For how many seconds must the detonation fuse burn if it is lit at the instant of launch?

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