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AQA AS Physics Mechanics LATEST UPDATE

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AQA AS Physics Mechanics LATEST UPDATE Terminal Velocity 1. Air resistance =0 & accelerates downwards 2. The speed and air resistance increases 3. Air resistance = weight, so a constant speed Terminal velocity for a parachute 1. Air resistance increases 2. Slows down, which decreases air resistance until it's balanced, taking a lower terminal velocity Factors affecting terminal velocity Shape Viscosity Lower impact force If impact time is greater Density mass per unit volume Hooke's Law

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AQA AS Physics Mechanics LATEST UPDATE
Terminal Velocity
1. Air resistance =0 & accelerates downwards
2. The speed and air resistance increases
3. Air resistance = weight, so a constant speed
Terminal velocity for a parachute
1. Air resistance increases
2. Slows down, which decreases air resistance until it's balanced, taking a lower
terminal velocity
Factors affecting terminal velocity
Shape
Viscosity
Lower impact force
If impact time is greater
Density
mass per unit volume
Hooke's Law
Extension of a string is directly proportional to the force applied, providing it hasn't
reached it's elastic limit
F=kL
Force
k-spring constant
L- Extension from natural
Parallel spring constant
K=Kx+Ky
Series spring constant
1/K=1/Kx + 1/Ky
Permanent extension
If a spring exceeds its elastic limit
Tensile stress

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