# 1 Forces and Motion – Part C2b “Momentum and Moments”

### Aims… (Triple Only)

1.25P know and use the relationship between momentum, mass and velocity:

momentum = mass × velocity      OR    p = mv

1.26P use the idea of momentum to explain safety features

1.27P use the conservation of momentum to calculate the mass, velocity or momentum of objects

1.28P use the relationship between force, change in momentum and time taken:

force = change in momentum/time taken

F = (mv-mu)/t

1.29P demonstrate an understanding of Newton’s third law.

1.30P know and use the relationship between the moment of a force and its distance from the pivot:

moment = force × perpendicular distance from the pivot

1.31P know that the weight of a body acts through its centre of gravity

1.32P use the principle of moments for a simple system of parallel forces acting in one plane

1.33P understand how the upward forces on a light beam, supported at its ends, vary with the position of a heavy object placed on the beam.

### Resources

This PowerPoint of resources covers most of the key ideas in the unit…

Extra Resources