00:01
Hello everyone, in this question we are given that a skier comes down along a circular track from point a to b.
00:07
The weight of skier is given in the question as 0 .80 klonuton and the velocity at a point a is given as 12 meter per second and we have to find out the velocity at point b.
00:24
Okay, so as we know that this radius is also given in the question as 30 meter, this radius is 30 meter, okay, so this is also 30 meter and this angle is 40 degree.
00:37
And the skear is coming from point a to point b.
00:41
So, as we know that work done by all the forces is equals to change in kinetic energy, and here since the surface is frictionless, so only force acting on this is gravitational force.
00:53
So, work done by gravitational force, that is m, g, h, vertical distance travel is h, this will be given by change in kinetic energy that means half m vb square minus half m va square so here first m and m will cancel out so ultimately we are having g as 9 .8 now the value of h as we know that this is the edge which which is the vertical height traveled by this gear now if this is 30 then this distance will be 30 into cost of 40 degree.
01:34
Okay, and the total distance was 30...