A firework: a height and two times
A firework: a height and two times
Secondary 2
A firework rocket is launched from the ground. Its height, \(h\) metres, \(t\) seconds after launch is modelled by \(h=35t-10t^2\).
- Find the height of the rocket after \(1\) second.
- Find the times at which the rocket is \(30\) m above the ground.
Solution:
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Answer:(a) \(25\) m
(b) \(t=1.5\) s or \(t=2\) s
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