what happens to velocity of purely rolling circular body on contacting an inclined plane on its path? what angle brings it to rest immediately?????

Dear Mhadevan,

A motion which covers equal distance in equal interval of time is called a Uniform motion. 
For the body to be in the uniform motion, it must be moving in the straight line path. 


The above graph shows, in every one second, there is a displacement of 10m. 
The body going with constant increase in velocity in equal interval of time is also the uniform motion.
The slope of displacement-time graph for uniform motion is constant and gives constant velocity.
Slope = dYdX  = displacementtime

Velocity (V) = dt, is constant 

Uniform Acceleration Graph

The V-t graph for uniform motion gives the constant acceleration. 
The slope of uniform motion of V-t graph gives acceleration. 
Slope = dYdX = dvdt, gives acceleration. The SI unit is m/s².

Some examples of uniformly accelerated motion: 

• The motion of a free falling body.
• The motion of a bicycle going down the slope of a road when the rider is not pedaling and wind resistance is negligible.
• The motion of a ball rolling down an inclined plane.
• The motion of the Pendulum Clock

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