Question

A body is projected at `30^(@)` with the horizontal. The air offers resistance in proportional to the veclocity of the body. Which of the following statements is correct?
A. The trajectroy is a symmetrical parabola
B. the time of rise to the maximum height is equal to the time of return to the ground
C. The velocity at the highest pint is directed along the horizontal
D. the sum of the kinetic and potential energies remains constant

Answer 1

Correct Answer - a
The upward motion is with higher retardation while the downward motion is with lesser acceleration. Further, the time of rise is less than the time of return. A part of the kinetic energy is used against friction.