P10 Flashcards
Braking distance
The distance travelled by a vehicle during thr rime it takes fkr its brake to act
Conservation of momentum
In a closed system the total momentum before an event is equal to the total momentum after the event, momentum is conserved in any collision or explosion, provided no external forces act on the objects that collide or explode
Directly proportional
A graph will shoethis if the line of best fit is a striaght line through the orgin
Elastic
A material is elastic if it is able toregai. Its shale after it has been squashed or stretched
Extension
The increase in length of a spring from its orginal lenght
Gravitational field strength
The force pf gravity on an object of mass 1kg. Kt is also the acceleration of free fall
Inertia
The tendency of an object to stay at rest or to continue in uniform motion
Limit of proportionality
The limit for Hookes law applied to the extension kf a stretched spring
Mass
Thw quantity of matter in an object
Momentum
This equals mass x velocity
Newtons second law of motion
The acceleration of An object is proportional to the resultsnt force on the object and inversely proportional to the mass of the object
Stopping distance
The distance travelled by the behicle in the time it tales for thr driver to think and brake
Trrminal velocity
The velocity reached by an object when the drag force is equal and opposite to the force making it move
Thinking distance
The distance travelled by the behicle in the time it takes thr driver to react
Weight
The force of gravity on an object
