PHYSICS P2
- Created by: AliceMcCombe
- Created on: 12-02-17 14:58
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- PHYSICS P2 - SECTION 1
- VELOCITY AND DISTANCE TIME GRAPHS
- BOTH SPEED AND VELOCITY ARE HOW FAST YOU ARE GOING. THEY ARE BOTH MEASURED IN M/S.
- HOWEVER VELOCITY UNLIKE SPEED MUST ALSO HAVE THE DIRECTION SPECIFIED.
- SPEED = DISTANCE X TIME
- DISTANCE TIME GRAPHS ...
- GRADIENT = SPEED
- FLAT SECTIONS = STATIONARY OBJECT
- STRAIGHT UP/DOWNHILL = TRAVELING AT A STEADY SPEED
- STEEPER THE GRAPH = FASTER IT'S GOING
- DOWNHILL = GOING BACK TO STARTING PIONT
- CURVES = ACCELERATION/DECELERATION
- STEEPENING CURVE (INCREASING GRADIENT) = SPEEDING UP/ACCELERATING
- LEVELING OFF CURVE (DECREASING GRADIENT) = SLOWING DOWN/DECELERATING
- ACCELERATION AND VELOCITY TIME GRAPHS
- ACCELERATION = HOW QUICKLY VELOCITY IS CHANGING
- ACCELERATION = CHANGE IN VELOCITY / TIME TAKEN
- (V - U) / T
- V = FINAL VELOCITY
- U = INITIAL VELOCITY
- T = TIME TAKEN
- ACCELERATION IS MEASURED IN M/(SXS)
- VELOCITY TIME GRAPHS ...
- GRADIENT = ACCELERATION
- FLAT SECTIONS = STEADY SPEED
- STEEPER THE GRAPH = GREATER THE ACCELERATION/DECELERATION
- UPHILL = ACCELERATION
- DOWNHILL = DECELERATION
- AREA UNDER GRAPH = DISTANCE TRAVELED
- CURVE = CHANGING ACCELERATION/DECELERATION
- ACCELERATION = HOW QUICKLY VELOCITY IS CHANGING
- WEIGHT, MASS AND GRAVITY
- GRAVITATIONAL FORCE IS THE FORCE OF ATTRACTION BETWEEN ALL MASSES
- IT HAS TWO EFFECTS ...
- ON THE SURFACE OF A PLANET IT WILL MAKE ALL THINGS ACCELERATE TOWARDS THE GROUND WITH THE SAME ACCELERATION (E.G. 10M/(SXS) ON EARTH)
- iT GIVES EVERYTHING WEIGHT
- GRAVITATIONAL FIELD STRENGTH IS MEASURED IN NEWTONS (N)
- IT HAS TWO EFFECTS ...
- MASS = THE AMOUNT OF 'STUFF' IN AN OBJECT (THIS WILL BE THE SAME ANYWHERE IN THE UNIVERSE)
- MASS IS MEASURED IN KILOGRAMS (Kg) AND IS MEASURED USING A MASS BALANCE
- WEIGHT = CAUSED BY THE PULL OF THE GRAVITATIONAL FORCE (THIS WILL DIFFER DEPENDING ON THE GRAVITATIONAL FORCE)
- WEIGHT IS MEASURED IN NEWTONS (N) AS IS A FORCE UNLIKE MASS AND IS MEASURED USING A SPRING BALANCE OR NEWTON METER.
- WEIGHT = MASS X GRAVITATIONAL FIELD STRENGTH
- W = M XG
- GRAVITATIONAL FORCE IS THE FORCE OF ATTRACTION BETWEEN ALL MASSES
- VELOCITY AND DISTANCE TIME GRAPHS
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