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Statement of a problem № 10700

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Two forces 1 and 2 act on a particle. As a result the speed of the particle increases. Which one of the following is NOT possible? (a) The work done by 1 is positive, and the work done by 2 is zero. (b) The work done by 1 is zero, and the work done by 2 is positive. (c) The work done by each force is positive. (d) The work done by each force is negative. (e) The work done by 1 is positive, and the work done by 2 is negative.




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