Which of the following describes the way an object moves when an unbalanced force acts upon it?
choose one answer.
a. the object will move in the direction of the force.
b. the object will not move.
c. the object will move in the opposite direction of the force.
d. the object will move back and forth.

which of the following descriptions show work being done?
choose one answer.
a. a person holding books.
b. a box sitting on the floor.
c. a ball on a stair.
d. a person lifting books from the floor to a table

a. The object will move in the direction of the force.

d. A person lifting books from the floor to a table

Explanation:

When we push a cart it moves in the direction of the push.  Objects always move in the direction of the force applied.    

So the answer is

a. The object will move in the direction of the force.

-------------------------------------------------------------

Work

In the first three options the displacement is zero. So work is also zero

But when the books are lifted by a person from floor to table, a work is done against gravity.

So the answer is

d. A person lifting books from the floor to a table

talk back to him about the sport and show him your expertise or leave the room

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