Elect the correct equations that show that when a 3.0-kg book is lifted 2.6 m its increase in gravitational potential energy is 78 j .

the closer the planet is to the sun, the larger the gravity

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