Physics

Physics, 22.08.2019 04:00, maddiemccarter3892

What is positive and negative work? can i have an example of both?

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Physics, 27.06.2019 17:20, 20Tiglashou

You throw a baseball straight up. compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down. a. the work is positive on the way up and positive on the way down. b. the work is positive on the way up and negative on the way down. c. the work is negative on the way up and positive on the way down. d. the work is negative on the way up and on the way down because gravity is always downward.

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Physics, 21.07.2019 13:30, flashpoint0117

An elevator held by a single cable is ascending but slowing down. part a is the work done by tension positive, negative, or zero? is the work done by tension positive, negative, or zero? positive zero negative submitmy answersgive up part b what about the work done by gravity? what about the work done by gravity? positive zero negative

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Physics, 30.09.2019 19:30, willveloz4

Discuss whether any work is being done by each of the following agents and, if so, whether the work is positive or negative. (a) a chicken scratching the ground a chicken does work on the ground. the ground does work on the chicken. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (b) a person studying (holding up a book but not moving it) the person does work on a book. the book does work on the person. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (c) a crane lifting a bucket of concrete the crane does work on the bucket. the bucket does work on the crane. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (d) the force of gravity on the bucket in part (c) the bucket does work on gravity. the force of gravity does work on the bucket. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (e) the leg muscles of a person in the act of sitting down the leg muscles do work on the individual. the individual does work on the leg muscles. the individual does work on the chair. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done.

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Biology, 28.10.2019 19:31, lazarus10

Two forces f1 and f2 act on a particle. as a result the speed of the particle increases. which one of the following is not possible? choose one answer.a. the work done by f1 is positive, and the work done by f2 is zero b. the work done by each force is positive. c. the work done by f1 is positive, and the work done by f2 is negative. d. the work done by each force is negative. e. the work done by f1 is zero, and the work done by f2 is positive.

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