IB skill practice

Connect force, energy, and momentum in multi-step mechanics

Paper 1, Paper 2 5 marks Difficulty 3

Work energy theorem speed change

A \(7\,\text{kg}\) cart in a school lift model changes speed from \(8\,\text{m s}^{-1}\) to \(15\,\text{m s}^{-1}\). Calculate the change in kinetic energy. 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.