# Find the force on an object on an inclined plane

## Homework Statement

A body is projected up an inclined plane with a speed Vo. The inclination of the incline is $$\theta$$. The surface of th incline is a tangent to a circle of radius R. Find the force acting on th object when it is at the top of the sphere provied that Vo= 2*the minimum velocity need to reach the top of the sphere.
The length of incline = L
Assume that the block does not lose contact with the track.

## The Attempt at a Solution

The minimum velocity required, as I calculated was:
$$\sqrt{2g[R(1-cos \theta)+ L sin \theta}$$ which was correct.
But the Force I calculated was diffrent.

At the top of the phere, the velocity will become Vo/2. Why oesnt (mV^2)/R give me the correct answer? as the body perform circular motion. Help me please.