What is the difference between a scalar and a vector?
As often described, a vector is a quantity that has a magnitude and a direction, whereas a scalar just has a magnitude. The easiest way to thing about it is to physically think if you could point in a direction, for example, you cannot point to how much energy was used or which way time flowed but you can point in the direction of your speed, hence becoming a velocity.
PB
Related Physics GCSE answers
All answers ▸The time taken for a wave to pass a point is 2.5 seconds. What is the frequency of the wave?
If a 60kg girl jumps out of a helicoptor, draw diagrams to show the forces (with values) acting on her when a) she is in freefall, b) she is accelerating at half of g (g = 10 m/s^2), c) she is travelling at a constant speed?
What is red-shift and how does it work?
Why is the car moving if the unbalanced force is zero?