CHAPTER 6 SIMPLE MACHINES WITH VERIFIED SOLUTIONS ALREADY GRADED A+

Work The use of force to move an object over a distance. Simple Machine A machine with few or no moving parts that you apply just one force to. lever A simple machine made of a bar that pivots on a fixed point. fulcrum The fixed point on a lever. wheel -and- axle A simple machine made of a wheel and axle that turn together. Pulley A simple machine made of a wheel with a line around it. Work The use of force to move an object over a distance. Inclined Plane A simple machine that is a slanted surface. Screw A simple machine made of a post with an inclined plane wrapped around it. Wedge A simple machine made of two inclined planes placed back-to-back. A hill an example of an inclined plane. A wheel with a rope or chain around it an example of a pulley a post with threads wrapping around it an example of a screw Force used to move an object over a distance is called Work The point where the lever pivots is called Fulcrum A bar that pivots on a fulcrum is called lever Two inclined planes that are back to back are called wedge Which of the following is an example of work to a scientist? lifting a chair off the floor. Where can the fulcrum of a lever "not" be found? not touching the bar. An inclined plane is part of which other simple machine? screw Which of the following does "not" change the direction of force? wheel-and- axle An ax blade is which kind of simpe machine? wedge Which simple machine is could be used to hold two objects together? screw Scientist have a special meaning for work. Which one of these is an example of scientist work? lifting a box off the floor. What must a wheel and an axle do to be a simple machine? The wheel and the axle must turn together. Four scouts are doing different jobs at camp. Which scout is using a pulley? Scout who raises the flag on the flag pole. A wedge is a simple machine. What other kind of sime machine do you need to make a wedge? Inclined plane Which of the following is a lever? bottle opener Which of the following is an example of work? packing a lunch box. Which simple machine would you most likely use to move a basket of fruit from the groud to a tree house? pulley.