Question: 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

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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