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    				| 1. | 
                                    A box of mass 8 kg is placed on a rough inclined plane of inclination theta. Its downward motion can be prevented by applying an upward pull F and it can be mad to slide upwards by applying a force of 2F. Find the coefficient of friction between the box and inclined plane. | 
                            
| Answer» A box of mass 8 kg is placed on a rough inclined plane of inclination theta. Its downward motion can be prevented by applying an upward pull F and it can be mad to slide upwards by applying a force of 2F. Find the coefficient of friction between the box and inclined plane. | |