A 500-G Book Is Resting on Top of a Shelf

question 67

Multiple Choice

A 500-g book is resting on top of a shelf 1 m above the floor.The book is 10 cm from the edge of the shelf.Accidentally the book is pushed off the shelf with a force of 25 N and falls to the floor following a parabolic trajectory coming to rest a horizontal distance of 20 cm from the edge of the shelf.If the coefficient of kinetic friction between the book and the shelf is 0.3,how much net work is done on the book?

• A)4.9 J
• B)0
• C)-4.9 J
• D)7.4 J
• E)-7.4 J