A camera boom is held horizontal by movable ballast fitted on the opposite side of its pivot. The boom's weight produces a clockwise moment of 120 N m. The ballast can be fitted at distances up to 0.80 m from the pivot.
Calculate the minimum weight of ballast needed to keep the boom horizontal.
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.