Paper 1 Flashcards
What is the principle of moments
For a body in equilibrium the sum of clockwise moments = sum of anti-clockwise moments
What is archimedes principle
Upthrust exerted on a body is equal to the weight of displaced fluid
What is elastic deformation
Will return to original shape when the load is removed
What is the definition of a strong material
High UTS
What is a ductile material
Easily draw into a wire
What is a brittle material?
No plastic deformation
What is the UTS?
Maximum breaking stress applied to a wire
What is Newton’s first law
An object will remain at rest or constant velocity unless acted on by a resultant force
What is Newton’s second law?
Force is equal to the rate of change in momentum
What is Newton’s third law
Object A exerts an equal and opposite force on object B
What is temperature in kelvin
Degrees + 273
What is mass of a substance?
Molar mass x number of moles
In pV= nRT what is n?
Number of moles
In pV= NkT what is N?
Number of molecules
What is isochronous oscillation?
Period is independent of amplitude
What is damping?
Reduction in amplitude over time due to energy loss from resistive forces
What is simple harmonic Motion?
Acceleration is directly proportional to displacement and in the opposite direction
What is light damping?
Amplitude of oscillator gradually decreases but the period is almost unchanged
What is very heavy damping?
No oscillatory motion return to equilibrium before a full oscialltion
When does resonance occur?
When the driving frequency = natural frequency
What effects does damping have on the SHM graph?
Reducing the maximum amplitude, reducing the frequency at which this maximum amplitude occurs
What is keepers first law?
The orbit of a planet is an ellipse with the sun at one focus
What is keplers eco d law?
a line segment joining a planet and the sun sweeps out equal areas in equal time intervals
What is keplers third law?
The square of the orbital period is proportional to the cube of the average distance from the sun
