When an object is approached electrostatically charged to a neutral body it is possible to charge it by induction, however, if it is touched for a moment the object will be charged by contact, explain this phenomenon, why this happens

When the charge body touches the other body, charge pass from it to the other body until get the charge is distributed over the largest possible surface, when separating the two bodies they are charged, but with half the initial charge, this phenomenon is called contact charge

Explanation:

When a charged body approaches another body, it attracts or repels the electrons of the other body, until the net charge is zero, that effect disappears when the body moves away.

When the charge body touches the other body, charge pass from it to the other body until get the charge is distributed over the largest possible surface, when separating the two bodies they are charged, but with half the initial charge, this phenomenon is called contact charge

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