What is the gravitational force between mars and Phobos

Explanation:

We have,

Mass of Mars is,

Mass of its moon Phobos,

Distance between Mars and Phobos, d = 9378 km

It is required to find the gravitational force between Mars and Phobos. The force between two masses is given by

Plugging all values, we get :

So, the gravitational force is .

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

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray