Rocket height model
Rocket height model
Secondary 2
8 marks
TGM Original Questions
Optional extension
A model rocket’s height is \(h=30t-5t^2\) metres after \(t\) seconds.
- Find its height at \(t=2.5\).[2]
- Find the two times when \(h=40\), and explain why there are two.[2]
- Find when it returns to the ground after launch.[2]
- Can it reach \(50\) m? Justify your answer using its maximum height.[2]
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.
Create a free account to practise similar questions.
Answer:(a) \(43.75\) m (b) \(t=2,4\) s, once ascending and once descending (c) \(6\) s (d) no, maximum \(45\) m at \(t=3\) s.
Need help? Join our E-Maths tuition for O-Level success.
Learn more