The distance travelled by the car whilst the brakes are applied and the car comes to a stop
2 of 32
Braking Force
The frictional force applied by the road on the tyre, in the opposite direction to the motion of the vehicle, that brings the vehicle to rest
3 of 32
Brittle
No plastic region and breaks at its elastic limit
4 of 32
Centre of gravity
The point where the weight appears to act
5 of 32
condition for mechanical equilibrium
resultant force = 0 and total moment = 0
6 of 32
Couple
A pair of equal and opposite forces
7 of 32
Density
Density = mass/volume
8 of 32
Displacement
A vectore directed from initial position to final position having magnitude equal to the distance between those points
9 of 32
Ductile
A ductile material has a large plastic region
10 of 32
Elastic Limit
If an object is a subject to a stress/force that produces a extention which exceeds the elastic limit of the sample then a permanent deformation will remain when the stress/force is removed
11 of 32
Extension
Length of spring/wire - orginal length
12 of 32
Hookes law
The extension is directly proportional to the force applied,provided the elastic limit is not exceeded
13 of 32
Line of action of a force
A straight line sharing parallel to the force considered and passing through the pointof application of the force
14 of 32
Moment of a force
moment = force x perpendicular distance from pivot
15 of 32
newton
A force of 1 newton will produce a acceleration of 1ms-2 when acting on a mass of one kilogram
16 of 32
Plastic deformation
the material is permanently deformed
17 of 32
Power
work done dived by the time taken
18 of 32
Pressure
Pressure = force x area
19 of 32
Principle of the conservation of energy
Energy cannot be created or destroyed, it can only be transferred into other forms
20 of 32
Principle of moments
For equilibrium of an object, the sum of the clockwise moments about a point must be equal to the sum of the anticlockwise moments about the same point
21 of 32
Resultant Force
The vector sum of of all the individual forces acting on a body
22 of 32
Stiff
A stiff material has a large Young modulus
23 of 32
Stress
stress = force / cross-sectional area
24 of 32
Strain
Strain = extension / original length
25 of 32
Stopping distance of a car
thinking distance + braking distance
26 of 32
Torque of a couple
Torque of a couple = one of the forces x perpendicular distance
27 of 32
Thinking Distance
The distance travelled from when the driver sees a problem and the brakes are applied
28 of 32
Vector quanity
A quantity that has both magnitude and direction
29 of 32
Velocity
Velocity = rate of change of displacement
30 of 32
Watt
Watt is the power used when one joule of work is done per second
31 of 32
Young Modulus
Young modulus = stress/strain
32 of 32
Other cards in this set
Card 2
Front
The distance travelled by the car whilst the brakes are applied and the car comes to a stop
Back
Braking distance
Card 3
Front
The frictional force applied by the road on the tyre, in the opposite direction to the motion of the vehicle, that brings the vehicle to rest
Comments
No comments have yet been made