Flashcards
Physics
Flashcards do conjunto (54)
- 1In the equation w=Fd what are the units for each?work = joules
Force = neutrons
distance = metres - 2Increasing the distance (w=Fd) lowers what?amount of work done
- 3In the equation p =w/t what are the units for each?Power = watt or Js-1
Work = joules
t = seconds - 4Power is the rate of what?work done
- 5In the equation v = d/t what are the units for each?volcity = ms-1
distance = metres
time = seconds - 6Instead of "going faster" and "going slower" when referring to acceleration?Increasing speed and decreasing speed
- 7What formula is used to find deceleration?a = change in volcity/change in time
then put a negative in front - 8How do you find distance on a speed-time graph?square = bxh triangle = 1/2xbxh
- 9What is the difference between mass and weight?mass = grams
weight = grams x force of gravity - 10What does this mean on a distance time graph?acceleration
- 11What does this mean on a distance time graph?deceleration
- 12The force which makes an object move forwards isthrust
- 13Earths gravity is equal to10 ms-2
- 14Work is measured injoules (J)
- 15work is (definition)work is done when force is applied over a distance to move an object
- 16Work, W = (formular)F x d
- 17Energy is (definition)The capacity to do work
- 18A moving object has what kind of energykinetic
- 19the energy an object gains when lifted isgravitational potential
- 20Ek a falling object has just before it hits the ground, is the same as its what before it was droppedEp, gravitational potential
- 21Ek = (formular)1/2 m v2
- 22Ep = (formular)m g h
- 23If the speed doubles to kinetic energyincreases by 4x
- 24As speed increases the stopping distanceincreases
- 25energy is never lost or gained onlytransferred or transformed
- 26The unit of powerwatt, W or Js-1
- 27Power = (formular)W/t
- 28If a force remains the same but the area increases, pressuredecreases
- 29if the force remains the same but are decreases, pressureincreases
- 30If the force increase but the area remains the same, pressureincreases
- 31if the force decreases but the area remains the same, pressuredecreases
- 32snow shoes and "work" because the force is spread over a ______ arealarger / greater
- 33a needle will exert enormous _______ because the surface area of the point where the force is applied is so smallpressure
- 34drawing pins "work" because the force is spread over a _______ areasmall / smaller
- 35camels feet have a large are also theyexert less pressure & don't sink in the sand
- 36pressure (definition)how much force object experts over an area
- 37at _____ velocity the weight force down equals the air resistance force upterminal
- 381 Nm-2 is the same pressure as 1pascal, Pa
- 39on a speed - time graph, a horizontal line meansconstant speed
- 40the area under a speed - time graph isdistance
- 41time is measured inseconds, s
- 42V = (formular)d/ t
- 43acceleration is measured inms-2
- 44velocity is measured inms-1
- 45the gradient of a distance/time graph isspeed
- 46gradient = (how to calculate on a graph)Rise / run
- 47negative acceleration is also calleddeceleration
- 48The gradient on a speed-time graph isacceleration
- 49Forces are measured innewtons, N
- 50if an object is accelerating the forces must beunbalanced
- 51mass is measured inkilograms, kg
- 52the downwards acting force is calledweight / weight force
- 53the force that makes a boat floatupthrust
- 54the force which slows an object downFriction force
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- level 2 Physics FlashCards sobre Physics , criado por Sophie Brooker em 19-10-2015.
- Criado por
- Sophie Brooker
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