Calculating Speed (GCSE Physics)
Calculating Speed
Speed of Objects
- Speed is a scalar quantity. Like distance, speed is also a scalar quantity. The speed of an object will tell us how fast it is moving, but will not tell us the direction of movement.
- Speed is not constant. The speed of an object is not the same at all times (i.e. it is not constant). We can understand this fact because when we run or walk, we hardly ever travel at the exact same speed all the time.
Calculating Speed
Formula for Speed, Distance, Time
Where:
- distance, s, in metres, m
- Speed, v, in metres per second, m/s
- time, t, in seconds, s
In the exam, they will often give you two elements of a three part formula, and ask you to work out the third.
Measuring the Distance and Time
There are many instruments used to measure distance and time. These measurements will allow you to calculate speed.
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