Work Work How would you define Energy Work

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Work

Work

Work How would you define Energy?

Work How would you define Energy?

Work Does a candy bar have energy?

Work Does a candy bar have energy?

A Milky Way candy bar contains more energy than a stick of dynamite. Calorimetry

A Milky Way candy bar contains more energy than a stick of dynamite. Calorimetry reveals that a Milky Way® candy bar contains more energy than a stick of dynamite. The candy bar contains 200 food Calories. That’s 200, 000 physicist calories or about 840, 000 joules! That’s enough energy to perform the work to lift an average 70 -kilogram human being 1200 meters in the air. Of course, the body cannot convert all of the energy from one candy bar into work. A lot of the energy goes into heat, and some of the work goes into digestion. Overall, less than 20 percent of the energy contained in food can be converted into work. Source: http: //dykn. com/a-milky-way-candy-bar-contains-more-energy-than-a-stick-of-dynamite/

Work Does gasoline have energy?

Work Does gasoline have energy?

If you fart consistently for 6 years and 9 months, enough gas is produced

If you fart consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb. Source: http: //dykn. com/if-you-fart-consistently-for-6 -years-and-9 -months-enough-gas-is-producedto-create-the-energy-of-an-atomic-bomb/

Work Energy - is a quantity that measures the ability to cause change. Without

Work Energy - is a quantity that measures the ability to cause change. Without Energy, nothing could ever change!

Work Energy appears in many forms, such as motion and heat (friction).

Work Energy appears in many forms, such as motion and heat (friction).

Work Energy can cause changes in temperature, speed, position, momentum, pressure, or other physical

Work Energy can cause changes in temperature, speed, position, momentum, pressure, or other physical variables.

The workings of the universe (including all of our technology) can be viewed from

The workings of the universe (including all of our technology) can be viewed from the perspective of energy flowing from one place to another and changing back and forth from one form to another.

Work • A gust of wind has energy because it can move objects in

Work • A gust of wind has energy because it can move objects in its path. • A piece of wood in a fireplace has energy because it can produce heat and light. • You have energy because you can change the motion of your own body. • Batteries have energy because they can be used in a radio to make sound.

Work Energy is measured in Joules, represented by J.

Work Energy is measured in Joules, represented by J.

Work Pushing with a force of one newton over a distance of one meter

Work Pushing with a force of one newton over a distance of one meter requires one joule of energy.

Work How would you define Work?

Work How would you define Work?

Work Ever use the word work like this: • You work on science problems.

Work Ever use the word work like this: • You work on science problems. • You go to work. • Your cell phone doesn’t work. (OMG!) • Doing homework is too much work.

Work In physics, work has a very specific meaning. Work is the transfer of

Work In physics, work has a very specific meaning. Work is the transfer of energy that results from applying a force over a distance.

Work To calculate work you multiply the force by the distance the object moves

Work To calculate work you multiply the force by the distance the object moves in the direction of the force. The distance doesn’t matter unless it is in the same direction as the force.

Work Make note of the units! If distance is not in meters, it must

Work Make note of the units! If distance is not in meters, it must be converted. Remember that F=ma, so work can also be W=(ma)d.

Work A joule is also the unit used for energy because work is a

Work A joule is also the unit used for energy because work is a form of energy.

A force of 1 newton applied for 1 meter does one joule of work

A force of 1 newton applied for 1 meter does one joule of work on the block.

Remember: • Work is a force acting though a distance • Work only occurs

Remember: • Work is a force acting though a distance • Work only occurs if the force causes an object to move • Work only occurs if the movement same direction as the force that is applied is in the

Remember: • Work is Energy • Energy is Work

Remember: • Work is Energy • Energy is Work

Work Is work being done if: You pick up a bowling ball off the

Work Is work being done if: You pick up a bowling ball off the floor?

Work Is work being done if: You carry a bowling ball across a football

Work Is work being done if: You carry a bowling ball across a football field?

Work Is work being done if: Two people pulling with the same amount of

Work Is work being done if: Two people pulling with the same amount of force on each end of a rope?

Work Is work being done if: You hit a tennis ball with a tennis

Work Is work being done if: You hit a tennis ball with a tennis racket?

Work Is work being done if: You push hard against a wall for an

Work Is work being done if: You push hard against a wall for an hour?

Work Is work being done if: You push against a book so it slides

Work Is work being done if: You push against a book so it slides across the floor?

Work Is work being done if: You stand very still with a book balanced

Work Is work being done if: You stand very still with a book balanced on your head?

Calculate the amount of work being done: You push a refrigerator with a force

Calculate the amount of work being done: You push a refrigerator with a force of 50 N and it moves 3 meters across the floor.

Calculate the amount of work being done: You push a refrigerator with a force

Calculate the amount of work being done: You push a refrigerator with a force of 50 N and it moves 3 meters across the floor. F= 50 N d= 3 m w= ? w=F x d w= (50 x 3) w= 150 J

Calculate the amount of work being done: You apply a 500 N force downward

Calculate the amount of work being done: You apply a 500 N force downward on a chair as you sit on it while eating dinner.

Calculate the amount of work being done: You apply a 500 N force downward

Calculate the amount of work being done: You apply a 500 N force downward on a chair as you sit on it while eating dinner. No movement occurs, so there is no work. w= 0 J

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