00:01
In this question we have taal is one of the most active volcanoes in the philippines and active volcanoes normally emit red -hot rocks and ash.
00:11
They are emitting huge rock with a speed of 30 meter per seconds at an angle of at an angle theta that is equal to 40 degree above the horizontal.
00:30
The rock strikes the side of volcano at an altitude of 25 meter lower at its starting point.
00:42
So we need to calculate the time it takes the rock to follow this path.
00:48
So according to question, from three equations of motion, we can say b in the direction of y square, that is equal to u in the direction of y square plus two times acceleration multiplied by the displacement.
01:02
Here acceleration is nothing but minus times acceleration due to gravity.
01:08
So vy square will be equal to uy square will be equal to this is v.
01:14
So uy will be equal to 30 sine of 40 degree.
01:22
Right? because let's suppose this is my rock and this is moving at this direction with an angle of 40 degree...