Physics Lab · WorksheetName
Class
Date
Your experiment, now in exam form.
Forces & Motion · Personalised practice
Instructions: Show formulas, substitutions, units and direction. Use g = 9.81 m/s² and round calculated values to two decimal places.
ObjectArchive crate, 50 kg
SurfaceTimber floor, μₛ = 0.25
Applied force180 N
Section A — Forces and friction
- Draw a labelled free-body diagram for the object before it begins moving.[3]
- Calculate the maximum static friction acting on the object.[3]
- Determine whether the object will begin moving from rest. Justify your answer by comparing forces.[3]
- Once moving, calculate the object’s acceleration using μₖ = 0.18. Include direction.[4]
- Predict how doubling the mass while keeping the applied force and surface unchanged would affect friction and acceleration. Explain.[4]
Total: 17 marks