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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 7 - Friction > A block B is placed on block A.The mass of block B is less than the mass of block A. Friction exists between the blocks, whereas the ground on which the block A is placed is taken to be smooth.A horizontal force F increasing linearly with time begins to act on B.The acceleration aA​ and aB​ of block A and B respectively are plotted against L .The correctly plotted graph is

A block B is placed on block A.The mass of block B is less than the mass of block A. Friction exists between the blocks, whereas the ground on which the block A is placed is taken to be smooth.A horizontal force F increasing linearly with time begins to act on B.The acceleration aA​ and aB​ of block A and B respectively are plotted against L .The correctly plotted graph is

A block B is placed on block A.The mass of block B is less than the mass of block A. Friction exists between the blocks A car starts from rest on a 1600 m long bridge. The coefficient of friction between the tyre and road is 0.8. The minimum time taken by the car to cross the bridge is