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Dynamics - Coggle Diagram
Dynamics
Momentum
p = mv
Vector
kgm/s
Conversion of Moment
Initial = final (no external forces)
Initial parallel to = final parallel to
Kinetic energy
E_k = 1/2(mv^2)
Elastic interaction (conserved)
Inelastic interaction (not conserved)
Explosions
Seperation
Always inelastic
Relative speed
Two Same direction
V_A - V_B
One moving only
V_A
Two Opposite direction
V_A + V_B
The numerical value is always positive
relative speed of approach = relative speed of separation (for perfectly elastic collisions)
Motion with resistive forces
Drag
Speed
Area presented
Streamlined
Motion under gravity with air resistance
Terminal velocity
Area & Velocity
Not mass
Friction
Materials in contact
Magnitude of contact force
Horizontal motion with air resistance
Higher speed Higher resistance
Projectile motion with air resistance
With air resistance, projectile path not symmetrical
Reduces both height & range
Newton's First Law
An object at rest stays at rest...
Translational Equilibrium
Free body diagram
Newton's Second Law
F = ma
Mass
Scalar
Kilogramme (kg)
Quantity of Matter
Inertia
Weight
Force of gravity on the object
Vector
Newtons (N)
F = (∆mv)/∆t = ∆p/∆t
Newton's Third Law
Every action has an equal and opposite reaction
True for both contact & non-contact forces