Asatellite dish is shaped like a paraboloid of revolution. the signals that emanate from a satellite strike the surface of the dish and are reflected to a single point, where the receiver is located. if the dish is 10 feet across at its opening and 4 feet deep at its center, at what position should the receiver be placed?

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

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