Future Experts come here and share their knowledge base and concepts with each other. Every article submitted is reviewed by experts. Nickels are awarded to articles in terms of authenticity, relevance, clarity and presentation.
Problem 1 A sphere is set to roll on a horizontal surface. However, the sphere gradually decelerates to a stop. In this case, the friction : (a)acts in the direction of motion (b)acts in the opposite direction of motion (c)accelerates sphere in rotation (d)decelerates sphere in rotation Solution 1 There is no external force on the sphere. The sphere is rolled and as such it should continue rolling without sliding at a constant velocity. However, rolling is not pure rolling as friction appears (even though there is no external force) to decelerate the sphere to a stop. The friction, therefore, acts in the opposite direction of motion.
more ...
submitted by magiclko (4210 m) on 5 Apr 2007 11:07:07 IST (4 comments 334 views)
