Motion in a Plane Class 11 Physics | Complete Chapter for NEET 2026 #neet

Added: 2026-05-22

[00:00:04]Like what do you mean by upstream and downstream?

[00:00:08]So, upstream is defined as when a boat is like when a boat is moving on a river when when the flow of river is opposite to the direction of the motion of the boat.

[00:00:18]If the two motions are opposite, we call it upstream. Similarly, the downstream is if the boat moves in the direction of the river flow. And the direction of river flow is sometimes called the direction of the stream.

[00:00:28]So, that's how the upstream and downstream came. Upstream means opposite to the stream. Downstream means in the direction of the stream. The upstream and downstream problem may not restricted to the simply to the boat. It may be distinct may be comes along in the swimming as well.

[00:00:42]So, upstream swimming in the sense if a person swims in opposite direction of the river or opposite direction of the stream.

[00:00:49]And the downstream swimming will be if a person swims in the same direction as the uh direction of the stream or the direction of the river.

[00:00:58]Now, as I mentioned Not just mentioned in real life or from real life experience you can tell in upstream the net velocity or the velocity of the boat actually increases like >> [music]