What is the unit of distance in mechanics?

The unit of distance in mechanics is metre (m).

In mechanics, distance is a fundamental concept that refers to the length between two points. It is measured in metres (m) and is a scalar quantity, meaning it only has magnitude and no direction. Distance is different from displacement, which is the change in position of an object and is a vector quantity.

The SI unit of distance, metre (m), is defined as the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second. This definition provides a precise and universal standard for measuring distance.

In mechanics, distance is used in various equations, such as the formula for average speed, which is distance travelled divided by time taken. It is also used in kinematic equations, such as the formula for displacement, which is the change in distance over time.

In addition to the metre, other units of distance are used in mechanics, such as centimetre (cm) and kilometre (km). These units are derived from the metre and are used for convenience in different situations. For example, centimetres are used for measuring small distances, while kilometres are used for measuring large distances, such as the distance between cities.