Recent content by rakesh

as mentioned by others, i concluded its not 180, its changing, at some point of time it becomes 180 by chance.

if we will rotate the vector with a constant angle with x axis, will its angle with y axis go on changing ?

ok, so no relations between angles as we have seen in 2D, what about alpha plus bita, its also not equal to 90 ?

my question is quite simple and i dnt want to enter into advanced approach of a unit vector and all.

i think each will be 60 degrees then but not sure.

have tried to rotate the vector and get angles instead of using an equation but did not get much, will appreciate if u can give a clear and direct answer, thanks.

I want to know if there is any proper relation between the angles of a vector with the three dimensional coordinate axes, if the angles are ,α , β and γ, will the sum of α, β and γ be 180 degress that is α + β + γ = 180°,m finding the same to be true in a 2 D case where α + β = 90° and γ =...

did not understand much, just one question when we say v = ds/dt, dt is very small tending to zero, is ds also very small, if so why dnt they cancel out and give v = 1.

is my assumption correct ? "seems the case arises only in the retarded motion, smaller a higher v and vice versa, in the accelerated motion whatever be a, v will go on increasing."

acceleration is not constant, u press more when velocity is less, u press infinite when velocity is zero.

like when u press the breaks of ur car less, its velocity will be high and when pressed hard it will become low, force and displcement will be in opposite directions in these scenarios and powe will always be negative.

seems the case arises only in the retarded motion, smaller a higher v and vice versa, in the accelerated motion whatever be a, v will go on increasing.

moreover if a and v are in opposie directions, power will be negative and if both in the same direction its positive, how can a case arise only that power can remain constant.

how to know that its not assumed ?

I think the discussion in this video is bit different but I dnt understand the difference, he solves it in two ways, in the second method at 2.00, he discusses through calckus,