Velocity is a speed and a direction, eg \(12 m\,s^{-1}\) on bearing 055 (55º East of North). The term acceleration can refer to a scalar acceleration or an acceleration vector. So far ...

A trolley is being pulled along a rough surface at a constant speed. Draw the free body diagram for this situation. The resultant vector for two vectors at right angles to each other can be worked ...

Two important contributors of early protection are speed of replication and onset of immunity, according to Alberto Giner, ...