Statistics for G481 - Mechanics - OCR Definitions - Forces in Action

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Hint	Answer	% Correct
Density	Mass per unit volume (Mass / Volume)	100%
Pressure	The normal force per unit cross sectional area (Force/Area)	100%
Stopping Distance	Braking Distance + Thinking Distance	50%
A couple	A pair of equal and opposite forces separated by a distance	0%
Equilibrium	Net force acting on the object must be zero, net moment about any point must also be zero	0%
A torque of a couple	One of the forces multiplied by the perpendicular distance between the forces	0%
Principle of Moments	Sum of clockwise moments = Sum of anticlockwise moments (around a point)	0%
Braking Distance	The distance travelled by the car between the time of the brakes being applied and the car stopping	0%
Thinking Distance	The distance travelled by the car in the time taken for the driver to react	0%
The Newton	The force required the accelerate a mass of 1kg to 1ms^-2	0%
Centre of Gravity	The point where an object's entire weight appears to act	0%