1. 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)?
F x d = W
550 lbs x 2,000 ft =
W = 1,100,000 ft-lbs.
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?

2. 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.

3. U3d-L2
SIMPLE MACHINES
input
input 2. 3.

4. U3d-L2
SIMPLE MACHINES
input 4.
input 5.

5. U3d-L2
SIMPLE MACHINES 6.
input

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

7. U3d-L2
SIMPLE MACHINES 2.
input
input

8. U3d-L2
SIMPLE MACHINES
input
input 3.

9. U3d-L2
SIMPLE MACHINES
input
input 4.

10. U3d-L2
SIMPLE MACHINES 5.
input
input

11. U3d-L2
SIMPLE MACHINES 6.
input
input

12. 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