16. A student finishes their classes for the year and puts all of their books in

Question

16. A student finishes their classes for the year and puts all of their books into a box (mass of box + books = 20 kg). They dig a hole in their backyard that is 1.1 meters deep and lower the box of books down into the hole. How much work did they do on the books by lowering them? How much work did gravity do? 16. A student finishes their classes for the year and puts all of their books into a box (mass of box + books = 20 kg). They dig a hole in their backyard that is 1.1 meters deep and lower the box of books down into the hole. How much work did they do on the books by lowering them? How much work did gravity do?

Explanation / Answer

Given data,

d= distance =1.1 m

W = work= Force ( mass x g (m/s^2)) x d

W = -20 x 9.8 x 1.1 = -215.6 J Negative sign shows that the force is exerted downward to put the box into the dig.

Work done by gravity is opposite of work done i.e. W = 215.6 J

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.