A block of mass M/2 is kept over another block of mass M and the heavier block is kept over smooth horizontal surface.The heavier block is long enough such that the smaller block does not fall during subsequent motion and there is friction bet. the blocks.Suddenly,the block ofmass M/2 is given an impulse J in horizontal dir......My question is whether the friction will be impulsive or non-impulsive????
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3 Answers
1161Non-impulsive
- Anurag Ghosh Why sir???Upvote·0· Reply ·2013-09-16 07:33:03
- Akash Anand Because Normal has to balance gravitational force mg in this case and mg is never impulsive.
- Anurag Ghosh Sir,whether electric force is an impulsive force?......suppose a block is kept on a smooth horizontal floor......And if an electric field is suddenly switched on for a small time and then switched off,so electric force in this case must be considered as impulsive r8?
- Akash Anand Yeah...In general we cant say which force will be impulsive or not ..it depend on the situation.
481Even friction can be impulsive in certain cases?
- Akash Anand Tell me just one thing ..if friction is mu times of N and if N can be impulsive then why not friction?
I have uploaded the class-11 ppt. Is that not enough to get this point clear?