Relative Velocity Part 1 Kinematics Physics Lesson

[pepper]

this taught me more in five minutes than my own teacher taught me in a week. very concise and easy to follow. thank you so much.

[rakabadi]

Plain and Simple!
Clearer than hours of lectures and quite a few pages.
Thank you!

[shezaa]

Why can't you be my physics teacher?

[danielletownsend]

Thank you very much for all the helpful videos. Clear, precise and easy to understand!

[PhysicsEH]

@hotpink8237 Thanks for taking the time to let us know you liked our videos.

[hellzkillerz]

I NEED A TEACHER LIKE U GUYS!!! teachers that actually teach-.-

[coronabob]

I am currently a student at university in NC. I have a test tommorow and i honestly couldnt understand the book to save my life. After watching this video i feel amazingly more comfortable as i just had a problem like this i couldnt figure out. THANK YOU!

[PhysicsEH]

@Arijana2010 Hi Thanks for letting us know. The time tab was not like that when we put the link up but now I will have to change it. We would not have known this without your comment, so thanks very much.

[PhysicsEH]

@RescuePits1 Thanks for the great comment. Glad we could help.

[sourteddy]

Omg thank you sooo much!! my teacher is giving us a unit test on this and he didnt explain this at all to us. This was a life saver :D

[PhysicsEH]

@xxAlexLoves182xx Surprisingly, the velocity of the water does not effect the time it takes to cross because the velocity of the river has no component or part in the direction across the river. If the river flows faster, you end up further down stream but you are still crossing at 6m/s toward the other side so it still takes the same time. If you consider the velocity triangle and the displacement triangle as a pair, it simplifies the solution (see 3:35) I hope this helps.

[PhysicsEH]

@trense13 Glad we could help. Thanks for letting us know.

[niily]

the last part of solving is amazing, never though this way

[PhysicsEH]

@GhuneDhoraGuitar Hi. Thanks for the comment. Glad we could help.

[kathryniii]

thank you sooo much! you just made my life 10x easier dealing with these physics problems haha
thank you! :)

[K]

These videos helped me with my exam! Thank you very much sir!

[PhysicsEH]

@pukawillive4ever Thanks for letting us know they helped. We love to hear that. Glad we could help.

[pukawilliveever]

WOWW this was really helpful..my life would never be the same

[PhysicsEH]

@LILMattOwns Thanks for taking the time to let us know we helped. Best of luck with your course.

[PhysicsEH]

@aroy41 Vr is what actually happens. The other velocities are what go into making Vr for instance in the case of a swimmer what happens Vr is a result of the swimmer swimming (Vs) and the water moving (Vw) So Vr = Vs + Vw.
For an airplane, what happens Vr is a result of the plane moving (Vp) and the wind moving (Vw) so Vr = Vp + Vw. The only time you get vector subtraction is when you are given Vr and need to solve for something else. When you rearrange the equation you might get Vp = Vr - Vw