Two charged objects originally felt 12N of attraction. One charge is changed from 3C to 6C and their distance changes from 15cm
apart to 45cm apart. What is the new force of attraction?

its c i just checked it

truck y has a greater velocity than truck x.

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

it was given as a lesson and guide for prayer.