A jet airplane flies with a speed of 1120 mph (mi/h) at an altitude of 2830 ft. It passes directly over my head. How soon (s) after it
passes directly above me will I hear the sonic boom? The speed of sound is 343 m/s.
(Caution: I am not asking how much time it took for the sound to travel from the
airplane when it was directly overhead. The sonic boom originates from the airplane
sometime before it reached the point directly overhead.)

the answer for apex is the lowest

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

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