A student weighing 200 N climbed a flight of stairs 9.0 m high in 4 s. How much work was done by the student?

Question

Quizplus · Accepted Answer

The work done by the student is given by the formula:

Work = force x distance x cos(theta)

where force is the weight of the student (200 N), distance is the height of the stairs (9.0 m), and cos(theta) is the angle between the force and the direction of motion (which is zero, since the force is acting vertically upward and the motion is also upward).

Therefore, Work = 200 N x 9.0 m x cos(0) = 1800 J

So, the correct answer is choice A, 1800 J.

A Student Weighing 200 N Climbed a Flight of Stairs