Aboat leaves a dock at 7: 00 pm and travels due south at a speed of 20 km/h. another boat has been heading due east at 15 km/h and reaches the same dock at 8: 00 pm. how many minutes after 7: 00 pm were the two boats closest together? (round your answer to the nearest minute.)

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

answerdmitry mendeleyev made a workable classification of the elements