Moments, Levers And Gears (physics Only) (GCSE Physics)

Which change will increase the moment produced by a force applied to a lever?

A spanner (wrench) handle is 0.30 m long. Applying 80 N at the end produces the same moment as applying which force at 0.60 m?

Which one of these will NOT change the moment produced by a force about a pivot?

A gear train: driver gear with 12 teeth drives gear with 36 teeth, which drives a final gear with 6 teeth meshed with the 36-tooth. If the driver rotates at 120 rpm, what is the speed of the final gear?

What are the SI units of a moment (turning effect)?

A 150 N force produces a clockwise moment of 300 N m about a pivot. What is the perpendicular distance from the pivot to the line of action of the force?

When two gears mesh, the tangential force at the teeth is transmitted from one to the other. If driver gear torque is 2.0 N m and its radius is 0.05 m, what is the tangential force at the teeth?

Which class of lever has the load between the pivot and effort?

A pair of meshed gears A and B have radii 0.10 m and 0.40 m respectively. If a force of 10 N is applied tangentially at A’s rim, what tangential force appears at B’s rim (neglecting losses)?

A wrench has two possible positions to apply a 50 N force: at 0.10 m or at 0.30 m from the nut. What is the ratio of the moments produced at the two positions (moment at 0.30 m : moment at 0.10 m)?

A simple calculation: a child pushes down on a see-saw 0.8 m from the pivot with a moment of 24 N m. What force did the child apply?