What's the difference between distance and displacement
Distance is a scalar, meaning it only has a magnitude. Displacement is a vector, meaning that it has both magnitude and direction. For instance, distance can state that I am "x" metres away from a point, displacement would state that I am "x" metres away in a "y" direction. If you travel away from a point then return, you have travelled a non zero distance, but your displacement is zero as you have returned to your original position.
EG
Related Physics GCSE answers
All answers ▸A reflex occurs the iris of the human eye in response to changes in light levels - describe how these changes occur, referring to the changes in light level in your answer.
At what angle does total internal reflection occur?
Why does a change in depth in water give a far greater difference in pressure than the same change in height in air?
In the photoelectric effect, why is the kinetic energy of the electrons independent of the intensity of light?