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Forces - Coggle Diagram
Forces
Scalar and vector quantities
Scalars
scalar quantities have only magnitude (size)
There are many scalar qualities: Distance, Speed, Time, Power and Energy
Vectors
Vector Quantities have Both magnitude (sizes) and direction
There are 6 Main vector quantities: Displacement, Velocity, Acceleration, Force, weight and momentum
Vectors change when their magnitude changes, there directions change or there magnitude and direction boath change
Equations of motion. The Euqtion of motion relate to the followingf five quantities
U - Initial Velocity
V - Final Velocity
A - Acceleration
T - Time
S - Displacement
Motion Graphs
Gradient = Change In Displacement/Change in T = s/t = Velocity
Gradient = Change in Velocity / Change in T = W/T = Acceleration
The area under a velocity-time graph gives the displacement.
For the constant positive velocity graphs and the constant positive acceleration graphs, the initial displacement is zero and the initial velocity is zero.
For the constant negative acceleration graphs the initial displacement is negative and the initial velocity is positive.
Contact & Non-Contact Forces
Contact Forces
Occurs when
two objects
are
physically touching
Examples
Air resistance:
when an object moves through air and collides with air molecules, slowing it down
Tension:
the pulling force that string or cable exerts when someone or something pulls it
Friction:
when two surfaces are touching and try to move against each other
Normal contact force:
a force from an object pushes on something equally, e.g. pushing a table
Non-Contact Forces
Occurs when objects are
separated
and
NOT physically touching
Examples:
gravitational force, electrostatic force, magnetic force
Scenarios
Non-contact:
A balloon attracting water via an electrostatic force
Contact:
Rugby players colliding with each other
A
force
is a push or a pull that acts on an object when it interacts with another object.