12/9/2023 0 Comments Relative motion definition![]() You can then easily determine the landing point Here you will typically be asked to determineĪ) Minimum time for the swimmer to cross the river – This will happen when the relative velocity of swimmer with respect to water is perpendicular to the shore because time to cross is determined by the component of velocity perpendicular to the shore and it will be $=\cfrac$ to determine the velocity vector with respect to the ground and the angle this velocity vector makes with the shore. It is similar to rain man problem and you are typically given the speed of swimmer with respect to still water and you are also given the speed of the river. Note that in all these 3 types of problems, we are either interested in establishing relative velocity vector in 2 dimensions or the velocity vector with respect to the ground.Īfterwards we will review the ways to a) determine minimum distance between two objects moving in two dimensions and b) determine time to collision for two objects moving in two dimensions. ![]() ![]() So, we will start our discussion with relative position and you will find two practice problems on relative position to help improve your understandingĪfterwards we will discuss relative velocity of one object with respect to another in one dimension followed by relative velocity in two dimensions where we will review rain man problem, the swimmer in river problem, and projectile problem where in projectile is projected from a moving platform at some relative velocity and projection angle and we will need to determine the initial velocity and projection angle with respect to the ground. ![]() Relative motion typically refers to, either the, relative position of one object as measured from the other object, or, relative velocity of one object with respect to another. ![]()
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