Required Recall Flashcards
(42 cards)
State the seven base quantities
Mass, Time, Distance, Amount of substance, Luminous Intensity, Current, Temperature
State the seven base quantities units
kg, seconds, metres, moles, candela, amps, kelvin
State the prefixes for all measurements lowest to highest
Pico - x10^-12 Micro - x10^-9 Nano - x10^-6 Milli - x10^-3 Kilo - x10^3 Mega - x10^6 Giga - x10^9 Tera - x10^12
What are the equations for area of a 2d shape
Square - baseheight
Triangle - 0.5baseheight
Circle - piradius^2
What are the equations for surface area of a 3d shape
Sphere - 4piradius^2
Cylinder - (2piradiusheight) + (2piradius^2)
Rectangular Block - 2(widthlength+heightlength+heightwidth)
What are the equations for volume
Rectangular Block - widthheightlength
Sphere - 4/3piradius^3
Cylinder - piradius^2height
What is the equation for circumference
2piradius
What is a scalar quantity? Give examples
A scalar quantity has magnitude
Speed, time, distance
What is a vector quantity? Give examples
A vector quantity has both direction and magnitude
Velocity, acceleration, displacement
What does the gradient represent on a distance-time graph? What does the area represent?
The gradient is the speed of the object and the area represents nothing
What does the gradient represent on a velocity-time graph? What does the area represent?
The gradient is the acceleration of the object and the area is the displacement
What does the gradient represent on a acceleration-time graph? What does the area represent?
The area is the velocity and the gradient is nothing
What is Newtons first Law of Motion
An object in motion stays in motion and an object at rest stays at rest unless acted on by an unbalanced force
What is Newtons second Law of Motion
F=ma
What is Newtons third Law of Motion
For every action, there is an equal and opposite reaction
What is an interaction pair
A force pair where force is exerted by an object and an equal force is exerted back onto the object e.g Pushing a block, force is exerted by the hand on the block but an equal and opposite force is exerted back onto the hand by the block
What is the law of conservation of linear momentum
The total momentum before a collision must be the same after a collision (providing no external force is applied during the collision)
What is the moment of a force
The moment is the turning effect of a force
What is the principle of energy conservation
Energy cannot be created nor destroyed, only conserved
What is the definition of current
The rate of flow of electric charge
What is the definition of the electromotive force
The amount of energy supplied by a source to a coulomb of charge
Under what conditions does Stokes Law apply
Constant temperature, low speed, laminar flow
What is the relationship between upthrust and displaced fluid
Upthrust is equal to the weight of fluid displaced
What is the limit of proportionality
The point that up until reached, Hooke’s law applies
