a traffic light hangs from a structure. the uniform aluminum pole AB is 7.5 m long and has a mass of 8.0 kg. the mass of the traffic light is 12.0 kg. determine the tension in the horizontal and vertical components of the force exerted by the pivot A on the aluminum pole. (AC is 3.80 m)

answer: point c: b. 1/2 potential, 1/2 kinetic, point a: 3/4 of its potential energy, point d or b: 3/4 potential, 1/4 kinetic

explanation: i cant explain. it's difficult to explain.

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

490 n

f=125n a=2.5m/s2