Use and describe the use of rules and measuring cylinders to find a length or a volume
Length: Use a ruler or measuring tape Volume of regularly shaped objects: Use the following formulas to find the volume of regular solids: -cube -> l³ -cuboid -> l x b x h -cylinder -> πr²h -sphere -> 4/3πr³ -cone -> 1/3πr²h Volume of irregularly shaped objects: Using displacement method By measuring the volume of displaced liquid an object. We can find the volume of these solids with the help of a measuring cylinder.
Understand that a micrometer screw gauge is used to measure very small distances
The measurement of a small distance (use of a micrometer screw gauge). Micrometers are used to measure small distances accurately. The screw micrometer is usually used to measure tiny or small objects.
Use and describe the use of clocks and devices, both analogue and digital, for measuring an interval of time
In digital time the numbers are shown. In analogue time the time is told of a clock.
Obtain an average value for a small distance and for a short interval of time by measuring multiples (including the period of a pendulum)
Measuring a pendulum swing One complete swing = A - B - A - C - A Measure the time for 25 swings and divide the result by 25
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Define speed and calculate average speed
Speed is the rate at which somethings moves. Total Distance ÷ Total Time = Average Speed
Distinguish between speed and velocity
Velocity is the speed with a direction, while speed does not have a direction. Speed is a solar quantity - it is magnitude of the velocity. Speed is measured in unites of distance divided by time.
Define and calculate acceleration
Acceleration is a measure of how quickly the velocity of an object changes. Acceleration = Change in Velocity ÷ Time Taken
Plot and interpret a speed-time graph and a distance-time graph
With this graph you can tell three things: speed, distance and acceleration. You can read the speed directly of the graph. You can find out the distance by calculating the area under the graph. The acceleration is found by calculating the gradient of the line. With distance time graph, you can find out the distance by reading it off the graph, and speed can be found by calculating the gradient of the time.
