PHYSICS PART 1
- Created by: Connor
- Created on: 12-02-14 17:02
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- PHYSICS PART 1
- acceleration, speed and velocity
- acceleration is speeding up, slowing down or changing direction
- velocity is the speed and direction of a moving object
- air resistance is the restrictive force acting on an object
- thrust is the forward force of an engine
- terminal velocity is the steady speed reached when the downwards force of gravity balances out the upwards force of air resistance
- open a parachute slows down and creates a surface area and accelerates upwards until the balance is equal
- deceleration is a negative acceleration
- resultant force is the single force that has the same effect as two or more forces acting on it
- in a velocity time graph you have to calculate the area below the line
- stopping distance
- thinking distance is effected by tired, influence of alcohol or drugs(suppresses the nervous system)
- thinking distance+braking distance=stopping distance
- braking distance is effected by weather, breaks, tyres
- Hookes law and elastic potential
- elastic potential is energy stored in an object due to the object being stretched or squashed
- when you let go of the elastic object the energy is transferred back to its original shape
- hookes law: the bigger the force you apply to an elastic object the bigger the extension (distance the object travels)
- graph of Hookes law
- up to the straight line the force and extension are directionnaly proportional
- when the line starts to curve it's called the limit of proportionality
- the elastic object is now deformed and cannot be changed back to it's original shape
- weight
- a force acting on an object due to the gravity of a planet
- mass
- how much matter an object is made up of
- energy
- work is energy transferred over a distance
- power is the amount of energy transferred per second
- gravitational potential energy is energy stored in a object due to the object being lifted up
- on earth the gravitational field strength is 10N per kilogram
- things that affect GPE: change in height, mass, gravitational field streghtn
- kinetic energy is movement and is effected by mass and speed
- acceleration, speed and velocity
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