Physics unit 3

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  • Created by: laura
  • Created on: 22-05-13 12:47
Newton's 1st law
a force is necessary to change the state of rest or of uniform motion in a straight line of body
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Newton's 2nd law
rate of change or momentum of an object is directly proportional to the net force acting upon it
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Newton
force that gives a mass of 1 kg an acceleration of 1 metre per second every second
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Newton's 3rd law
when body a exerts a force on body b, body b exerts a force back on body a that is equal opposite in direction and of the same type
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Prinsiple of conservation of momentum
in any direction, in the absence of external forces, the total momentum of a system remains constant
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Impulse
= to the change in momentum of a body. = to the area under a force-time graph
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elastic collsion
no momentum or ke is lost
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Inelastic collision
momentum is conserved but ke is lost
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Radian
One radian is the angle subtended at the centre of a circle by an arc of length = to the circle's radius
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Gravitational field strength
at any point it's the force acting per unit mass at that point
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Gravitational force
GF between 2 bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
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Kepler's 3rd law
the period of a planet squared = the mean radius of it's orbit cubed
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Resonance
is the build-up of a large-amplitude oscillation when the frequencies of vibration objects match
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Internal energy
is the sum of the random distributions of ke and pe of all the molecules in the body
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Ideal Gas
Has internal energy only in the form of random kinetic energy
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Specific heat capacity
quantity of thermal energy required to raise the temperature of a unit mass by a unit temperature rise
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Specific latent heat of fusion
quanity of energy per unit mass needed to change a solid into a liquid
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specific latent of vaporisation
quantity of energy per unit mass needed to change a liquid to a gas
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Boyle's law
the volume of a fixed mass of gas is inversely proportional to the pressure exerted on it, provided the temperature is kept constant
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Other cards in this set

Card 2

Front

rate of change or momentum of an object is directly proportional to the net force acting upon it

Back

Newton's 2nd law

Card 3

Front

force that gives a mass of 1 kg an acceleration of 1 metre per second every second

Back

Preview of the back of card 3

Card 4

Front

when body a exerts a force on body b, body b exerts a force back on body a that is equal opposite in direction and of the same type

Back

Preview of the back of card 4

Card 5

Front

in any direction, in the absence of external forces, the total momentum of a system remains constant

Back

Preview of the back of card 5
View more cards

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