Impulse & Collision Evidence — Drills · Grade 12 Science
Chapter: Work, Energy & MomentumWhat these drills covers
By the end of Impulse & Collision Evidence you should be able to:
- I can use a force-time area to calculate signed momentum change.
- I can explain collision time, average force, and system conservation.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: impulse, external impulse.
Problem 1
A 3 kg object slows from 5 m/s to 0. Find signed impulse.
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
-15 N·s
3(0−5)=−15.
Problem 2
Does padding conserve an object’s momentum?
Answer and explanation
No; it changes momentum over a longer time and can reduce average force.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.