# Uniform circular motion – accessible

This diagram has a blue circle that represents the circular path on an object. In the middle of the blue circle is a line that describes part of a circle with an arrow on the end pointing towards the beginning of the line. This suggests circular motion and is labelled with the Greek lower case letter omega. Around the edges of the blue circle are four dots representing the object at different points in its progress around the circumference of its circular motion. Each of these dots has a blue arrow pointing towards it into the middle of the big blue circle that represents the perpendicular force acting on the object. Each of these arrows is labelled with a lowercase a with a small arrow above it pointing to the right. The small arrows above the lowercase a are all pointing the same direction and this is not the same direction as the larger blue arrow belonging to each dot that is pointing to the centre of the big blue circle except in the case of the left hand side dot. Additionally there is another arrow, coloured red that is pointing away from the dots representing the moving object. These red arrows represent the motion of the object, which would be moving in a straight line if the perpendicular force was not acting on it. Because these motion arrows are representing a straight line they point out of the dot at a 90 degree angle from the blue arrow. These red arrows are labelled lowercase v and have a small arrow above them which are all pointing to the right regardless of the direction that the larger red arrow is pointing. For example the dot representing the object at the top point of the large blue circle, in the north pole position, has a red arrow pointing to the left and a blue arrow pointing into the middle of the circle at a 90 degree angle to the red arrow.