A streamline is a line that is tangential to the instantaneous velocity direction (velocity is a vector, and it has a magnitude and a direction). To visualize this in a flow, we could imagine the ...

Therefore, the tangential component of acceleration always points "backward" of the direction of motion. The normal component decreases as P moves along the track since the speed of P is decreasing.

A streamline is a line that is tangential to the instantaneous velocity direction (velocity is a vector, and it has a magnitude and a direction). To visualize this in a flow, we could imagine the ...