End a of the link has a downward velocity va of 7 m/sec during an interval of its motion. for the position where q = 70° determine the angular velocity w of ab and the velocity vg of the midpoint g of the link. solve the problem twice, once using the geometry of the vector polygon (graphical methods) and once using vector algebra (analytical methods).

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