- #1
Sefrez
- 126
- 0
Normally when finding the normal force on an object on a incline, I find the magnitudes of gravity in the perpendicular and parallel directions to the incline and have that multiplied by mass. Here is a diagram of that:
http://www.freeimagehosting.net/38f87
Which means that the magnitude of n is m*g*cos theta.
On another kind of problem were I am asked to find the speed that a mass can move around a circle of an inclined plane, the normal force is different:
http://www.freeimagehosting.net/edfa7
In this case n = m*g / cos theta.
Why is this?
http://www.freeimagehosting.net/38f87
Which means that the magnitude of n is m*g*cos theta.
On another kind of problem were I am asked to find the speed that a mass can move around a circle of an inclined plane, the normal force is different:
http://www.freeimagehosting.net/edfa7
In this case n = m*g / cos theta.
Why is this?