# Mechanics (2821, G481) OCR Vectors and Moments Definitions, Equations and Units.

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- Created by: Alex James Thomas
- Created on: 21-11-11 20:25

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**Some Definitions and Equations with Units.**

Moment = Force x Perpendicular distance to pivot.

Force: N

Distance: M

Moment: Nm (NxM hence dist. x force)

Eg. 1 Define a Moment:

When a body is in equilibrium Anticlockwise Moments = Clockwise Moments.

(Jan 09 q.5 a.)

Define a Newton:

1N is required to accelerate an object of 1kg at 1ms(^-2)

Torque of a couple = Magnitude of one of the force x Distance between forces.

Froce: N

Distance:…

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