A book is at rest on a table. Identify the correct free-body diagram for this situation. A free body diagram with the two vectors pointing down. The first is labeled F Subscript g Baseline and the second is labeled F Subscript N Baseline. A free body diagram with two vectors of same length but pointing in opposite directions. The force upward is labeled F Subscript f Baseline. The force downward in labeled F Subscript g Baseline. A free body diagram with two vectors of same length but opposite direction. The force upward is labeled F Subscript N Baseline. The force downward is labeled F Subscript g Baseline.

explanation:

the masses of the objects and the distance between them

see earlier answer

truck y has a greater velocity than truck x.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia