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CBSE Class 11-science Answered

if a ball is dropped on a frictionless plain ,then in which direction the ball will travel ,since a frictionless plain gives no reaction?
Asked by | 18 Jan, 2012, 05:52: PM
Expert Answer
If there is a frictionless plain, it provides normal reaction force. So your statements are all incorrect.
 
Since the friction is not present, it means only there will be no frictional force, the normal force will appear , so if you throw the ball vertically, it will bounce back vertically. It is not true as you have said.
 
And if you drop the ball at an angle, then the ball will keep bouncing and moving forward till its vertical component of the speed becomes zero due to successive collisions with the surface and in the end the ball will continue moving on the frictionless floor with a constant speed.
 
Thank you
Answered by | 19 Jan, 2012, 03:14: PM
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