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2444221
Basic Physics
Descrição
Topic 1
Sem etiquetas
physics
a levels
Mapa Mental por
Kiran16
, atualizado more than 1 year ago
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Criado por
Kiran16
mais de 9 anos atrás
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Resumo de Recurso
Basic Physics
Scalars: quantities with magnitude only
examples
density,mass,volume,time,length,work etc
Vectors: quantities with magnitude and direction
examples
displacement,velocity,acceleration,force,momentum,gravitational field strength
Newton's Third law
If a body A exerts a force on body B, the body B exerts an equal and opposite force on A.
identify a newton pair:
the forces must be of the same type
the forces act on different objects
Free Body diagrams
arrows must touch objects
draw arrows approximately to scale
arrows must originate from where the force is acting
Newton's Second Law
F=ma
M= 1/gradient
TRIGNOMETRY
Components of Vectors
the components of a vector are usually determined in 2 perpendicular directions
Vertical Component: sin
Horizontal Component: cos
DENSITY: mass/volume
MOMENTS
Moment= f*d
Equlibrium
A body is in equilibrium when
no resultant force acts on the body
the net moment about any point are zero
PRINCIPLE OF MOMENTS
Clockwise moments = Anti clockwise moments
Sum of vertical forces is Zero
F1 + F2 - R = 0
CENTRE OF GRAVITY
A point where the weight of the body or system may be considered to act
Anexos de mídia
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