# Glencoe Science Level Blue

## Chapter 20: Work and Simple Machines

 1 To pull a weed out of a garden, you can apply a force of 50 N to the shovel. The shovel applies a force of 600 N to the weed. What is the mechanical advantage of the shovel? A) 8 B) 10 C) 12 D) 15 2 To pry a nail out of a wall, you can apply a force of 50 N to the hammer. The hammer applies a force of 650 N to the nail. What is the mechanical advantage of the hammer? A) 10 B) 11 C) 15 D) 13 3 To lift a block on a movable pulley, you can apply a force of 50 N to a rope. The rope applies a force of 700 N to the block. What is the mechanical advantage of the rope? A) 14 B) 10 C) 16 D) 18 4 To pull apart two pieces of wood, you can apply a force of 50 N to the lever. The lever applies a force of 640 N to the weed. What is the mechanical advantage of the lever? A) 11 B) 15 C) 17 D) 13 5 To lift a refrigerator, you can apply a force of 50 N to the wedge. The wedge applies a force of 550 N to the weed. What is the mechanical advantage of the wedge? A) 11 B) 9 C) 13 D) 18 6 To pry open a soda can lid, you can apply a force of 50 N to a car key. The car key applies a force of 390 N to the lid. What is the mechanical advantage of the car key? A) 6 B) 10 C) 8 D) 12 7 To lift a bookshelf, you can apply a force of 50 N to a wedge. The wedge applies a force of 800 N to the bookshelf. What is the mechanical advantage of the wedge? A) 20 B) 18 C) 16 D) 22 8 To pry a wooden board off of a treehouse, you can apply a force of 50 N to a lever. The lever applies a force of 750 N to the weed. What is the mechanical advantage of the lever? A) 13 B) 18 C) 12 D) 15 9 To lift a television, you can apply a force of 50 N to a wedge. The wedge applies a force of 480 N to the weed. What is the mechanical advantage of the wedge? A) 10 B) 12 C) 15 D) 22 10 To pull a tree out of a yard, you can apply a force of 50 N to the shovel. The shovel applies a force of 900 N to the weed. What is the mechanical advantage of the shovel? A) 12 B) 16 C) 20 D) 18