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Physics so far in year 9 gcse (Terms (vectors (Velocity (velocity time…
Physics so far in year 9 gcse
Netwon
second law
f=ma
force = mass x acceleration
third law
for every action there is a equal and opposite reaction
1st law
and object will stay at rest or in motion till a force acts upon it
Formular
Average speed= distance / time
Acceleration
Acceleration=change in velocity m/s ÷time taken
momentum = mass time velocity
Terms
vectors
This is a quantity that has magnitude and logitude
E.G. 50 Km north is a vector becuase it has a direction as well as a quantity
Velocity
Velocity is the speed at which something moves in a particular direction.
velocity time-graphs
https://bam.files.bbci.co.uk/bam/live/content/zjvw6sg/large
momentum
Scallers
A quantity that has only magnitude
E.G.Km-this is just a measurement and does not give a direction.
Meters
Velocity
Velocity is the speed at which something moves in a particular direction.
centipital force
a object that moves in a inwards spiral
mass and weight
mass
The mass of an object is the amount of matter or "stuff" it contains. The more matter an object contains, the greater its mass. An elephant contains more matter than a mouse, so it has a greater mass. Mass is measured in kilograms, kg, or grams, g.
weight
Weight is a force caused by gravity. The weight of an object is the gravitational force between the object and the Earth. The more mass the object has the greater its weight will be.
Weight is a force, so it's measured in newtons. On the surface of the Earth an object with a mass of 1 kg has a weight of about 10 N.
inertial mass
m=f/a
inertia
the tendency to do nothing
it is the property of matter that resits changes in motion
Graphs
Distance time graphs
http://www.bbc.co.uk/staticarchive/4290b412e1210381d2a5f21b2fbd4a08259a4e59.gif
General stuff.
acceleration of a object in free fall
An object in free fall has a acceleration of 9.8 m/s/s.
Walking speed.
1.4m/s
