Case study·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A large open tank has a small hole in its side. The hole is below the water surface and above the ground. Take .
Total: 5 marks
(a) Find the speed of water as it leaves the hole. (1 mark)
(b) Find the time taken by the water stream to reach the ground after leaving the hole. (1 mark)
(c) Find the horizontal distance from the wall where the stream hits the ground. (2 marks)
(d) State one assumption used in applying Torricelli's theorem here. (1 mark)
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