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Physics P5 - Coggle Diagram
Physics P5
Newtons Laws
Second
resultant force = mass × acceleration
The equation shows that the acceleration of an object is: proportional to the resultant force on the object inversely proportional to the mass of the object
Third
According to Newton's third law of motion, whenever two objects interact, they exert equal and opposite forces on each other.
First
According to Newton's first law of motion, an object remains in the same state of motion unless a resultant force acts on it. If the resultant force on an object is zero, this means: a stationary object stays stationary, a moving object continues to move at the same velocity. The tendency of an object to continue in its current state (at rest or in uniform motion) is called inertia
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Pressure
Atmospheric pressure
Air molecules colliding with a surface cause atmospheric pressure. Atmospheric pressure at sea level is about 101,000 Pa (101 kPa) but just 27,000 Pa (27 kPa) at the cruising altitude of a passenger plane.
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Mrs Stabler says remember Hagrid in boots and Hermione in high heels, Force in a small area = higher pressure
Pressure = force ÷ area
forces
Contact
Reaction force (Book on a table), Tension (Cable holding a ceiling lamp), Friction (a box sliding down a slope) and air resistance (a skydiver falling through the sky)
Non-Contact
Magnetic force (any magnetic material in a magnetic field), Electrostatic force (any charged particle in a magnetic field) and Gravitational force (any mass in a gravitational field)
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Elasticity, spring constant,
and Hooke's Law
Extension happens when an object increases in length, and compression happens when it decreases in length. The extension of an elastic object, such as a spring, is described by Hooke's law: force = spring constant × extension
