Question

Activity - Problem Solving
A box is pulled to the right with the constant force of 15 N across a horizontal leveled to a distance of 7.

a.) If the force is applied parallel to the floor, how much work is done on the box?

b.) if a boy pulls the box at an angle 10° above the horizontal, how much work is done on the box?

Note: w=work
F= Force
∆× = distance or (d)​

Answer 1

Answer:

In a previous part of Lesson 1, work was described as taking place when a force acts upon an object to cause a displacement. When a force acts to cause an object to be displaced, three quantities must be known in order to calculate the work. Those three quantities are force, displacement and the angle between the force and the displacement. The work is subsequently calculated as force•displacement•cosine(theta) where theta is the angle between the force and the displacement vectors. In this part of Lesson 1, the concepts and mathematics of work will be applied in order to analyze a variety of physical situations.