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W=Fd (7.11.2)
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Gravity
Key Concepts:
Terms in this set (12)
96 J
A person pushes a block 4 m with a force of 24 N. How much work was done?
11.5 N
A person does 15 J of work moving a couch 1.3 m. How much force was used?
24 N
Paul Konerko hit a 125 m grand slam in Game 2 of the World Series. He did 3000 J of work. With what force did he hit the ball?
85 J
You lift a box that weighs 50 N to a height of 1.7 m. How much work did you do on the box?
2,100,000 J
A 750 N skydiver jumps out of an airplane that is flying at an altitude of 2800 m. By the time the skydiver reaches the ground, how much work was done on her by gravity?
4,166.7 N
A bulldozer performs 75,000 J of work pushing dirt 18 m. What is the force exerted?
0 J
Mr. Z holds 200 kg above his head for 5 seconds. What is the work done on the weights?
16,170 J
If Ms. Oldham has a mass of 55 kilograms and climbs up stairs that are 30 meters tall then how much work was done?
6.8 kg
If 100 J of work are done by lifting a box 1.5 m, then how much mass was the box?
264 J
You hurry to your physics class after a yummy meal in the cafeteria. In your arms you carry books that include your highly valued Physical Science binder. All together the food and the binder weigh 22 N. How much work is done on the books when you walk 80 m along the hall, go up stairs 12 m high, and then turn right for an additional 15 m to class?
law of conservation of Energy
energy cannot be created or destroyed, only transformed.
W=FxD
Formula for Work
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