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.

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.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.