Impulse from momentum change
A cart of mass \(0.4\,\text{kg}\) in a warehouse cart audit changes speed from \(4\,\text{m s}^{-1}\) to \(12\,\text{m s}^{-1}\). Calculate the impulse. Identify the force, momentum, or energy relationship before entering the result. Enter the numerical result and choose the interpretation that matches the mechanics meaning.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.