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.

Question

Roach

Biology

5 September, 16:44

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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Answers (1)

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Amaya Russell · Answer 1

Option D, The work done by each force is negative

Explanation:

When both the forces are negative, then irrespective of which force is large or small, the net force will definitely negative. A negative force indicates reduction in kinetic energy of particle. Since mass is constant, it is the speed which reduces and produces negative work. Reduction in speed is contrasting to the statement give in the question. Hence, option D is not possible.