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                                    16.An engine can pull 4 coaches at max. speed 20m/s. Mass of engine is twice that of one coach. Assuming resistive force to be proportional to the weight, approximate max. speed of engine when it pulls 12 and 6 coaches respectively. | 
                            
| Answer» 16.An engine can pull 4 coaches at max. speed 20m/s. Mass of engine is twice that of one coach. Assuming resistive force to be proportional to the weight, approximate max. speed of engine when it pulls 12 and 6 coaches respectively. | |