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.

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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

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