movement and position

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  • Created by: sophie_kk
  • Created on: 15-11-19 20:42
torque
turning effect - newton metre (N m)
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momentum
kilogram metre per second (kg m/s)
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speed and velocity
metre per second (m/s)
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acceleration
metre per squared second (m/s2)
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force
newton (N)
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gravitational field strength
newton per kilogram (N/kg)
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equation for speed
speed = distance/time v =s/t
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how to measure speed of cars on road
1. measure 50m from a start point along the side of the road 2. start stopwatch when your partner signals that a car is passing the start point 3. stop stopwatch when car passes you at finish point
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how to convert m/s to km/s
multiply by 3.6
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displacement
distance travelled in a particular direction from a specified point
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vector
quantity that has both size and direction eg displacement + force
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equation for average velocity
average velocity = increase in displacement / time taken
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why might the average speed of a walker be greater than calculated (provided that the distance between A and B is 3 km north -west from each other)
the walker has to follow the roads, therefore the distance walked is greater (displacement)- meaning the average speed calculated using distance must be greater than his average velocity (calculated using displacement)
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describe an experiment to measure the motion of everyday objects such as toy cars or tennis balls
using a ramp you will measure the height at which the car will be released. this will be measured with a metre ruler, making sure the ruler is perpendicular to the bench surface. you will use the equation v = s/t .
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experiment continued
you will then need to measure the distance between the furthest point on the car, and measure the time it takes for the car to travel the distance.
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acceleration
the rate at which objects change their velocity. it is defined as follows
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acceleration equation
acceleration = change in velocity/ time taken or final velocity (v) initial velocity (u) / time taken
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velocity
the speed of something in a given direction
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acceleration equation (2)
v2 = u2 = (2as)
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terminal velocity in liquids
will have a lower terminal velocity because the drag forces in liquids are much higher than in gases
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investigating terminal velocity
1. fill a tall measuring cylinder with water and drop small-diameter (1-2mm) glass balls into it. You could measure the terminal velocity using a light gate and a data logger
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Other cards in this set

Card 2

Front

momentum

Back

kilogram metre per second (kg m/s)

Card 3

Front

speed and velocity

Back

Preview of the front of card 3

Card 4

Front

acceleration

Back

Preview of the front of card 4

Card 5

Front

force

Back

Preview of the front of card 5
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