1. Add to Pulley Lab/notes in your journal Mechanical Advantage of pulleys – More pulleys = more support (divides the rope into more sections to support the load) More support = less force (but I have to pull on more rope = more distance)

2. Inclined Planes Steeper = more force (because there is less support against gravity of the load) Shallow (gradual or less steep) = less force (because there is more support against gravity of the load) gravity Distance Less support/ more force More support/less force

3. Question 4 The graph shows the speed of a car traveling over a 12 second period on a flat surface. In the first 6 seconds shown on the graph, the car is:

4. Simple Machines A single fixed pulley changes the direction of motion of an object only – you still have to use the same amount of force to lift the object. The mechanical advantage of a machine means using the machine requires a smaller force to move an object, but the distance increases to keep the amount of work the same. A wedge, screw, and inclined plane are types of ramps. For a single movable pulley, the input force is always less than the output force – it has a mechanical advantage. An inclined plane uses less force over a greater distance to decrease the amount of force needed to do work (mechanical advantage). As the length of an inclined plane is increased, the force decreases.