U3d-L2 January 3, 2008 DRILL 1. A hot air balloon carries 200 lbs cargo, 150 lbs human, and 200 lbs materials up a distance of 2,000 feet. How much work did the balloon do (keep all units)? 1. F x d = W 550 lbs x 2,000 ft = W = 1,100,000 ft-lbs. 2. F x d = W 150 lbs x d = 30,000 ft-lbs. 150 lbs. 150 lbs. d = 200 ft. A physical therapy doctor told his 150-lb patient to do 30,000 ft-lbs of work each day to rehabilitate his leg. The patient decides to climb a hill to perform this work. How high does the patient need to climb in order to meet his goal?

U3d-L2 SIMPLE MACHINES With a partner, you must create two solutions to each of the following problems. Then, identify common mechanical devices that exhibit characteristics similar to either of the mechanisms you have created.

U3d-L2 SIMPLE MACHINES input input 2. 3.

U3d-L2 SIMPLE MACHINES input 4. input 5.

U3d-L2 SIMPLE MACHINES 6. input

U3d-L2 SOLUTIONS input input input 2. 3. 4. input input 5. 6.

U3d-L2 SIMPLE MACHINES 2. input input

U3d-L2 SIMPLE MACHINES input input 3.

U3d-L2 SIMPLE MACHINES input input 4.

U3d-L2 SIMPLE MACHINES 5. input input

U3d-L2 SIMPLE MACHINES 6. input input

U3d-L2 MACHINES Machines are artifacts that transmit or change the application of power, force, or motion. What is an artifact? something created by humans usually for a practical purpose. Machines can be simple or complex Complex machines are comprised of…. Simple Machines