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) Find the initial elastic potential energy stored in the spring. (1 mark)
(b) Find the speed of the block just after the spring returns to its natural length. (1 mark)
(c) Find the work done by friction on the rough strip. (1 mark)
(d) Find the kinetic energy of the block at the foot of the ramp. (1 mark)
(e) Find the maximum vertical height reached on the smooth ramp. (1 mark)