A technician uses a rigid lifting bar that can turn about a fixed pivot. A downward load force of 900 N acts 0.20 m to the left of the pivot. The technician applies a downward effort 0.75 m to the right of the pivot. Both forces act perpendicular to the horizontal bar. The bar is balanced and its weight can be ignored.
Calculate the size of the effort applied by the technician.
The technician applies the same effort 0.90 m from the pivot instead. Explain what happens to the load.
124 exam-style questions on AQA GCSE Physics 5.4 Moments, levers and gears, covering 5.4 Moments, levers and gears. Each one has a worked solution and a mark scheme showing where the marks go.