A firefighter, whose mass (including clothing and equipment) is m= 78 kg, hears the alarm and slides down the pole with a constant downward acceleration of magnitude a= 3.73 m/s2 . Write an expression for the magnitude of the force, F, exerted on the firefighter by the pole. Answer in terms of the variables from the problem statement as well as g for the acceleration due to gravity.
A. F=m⋅(g−a)
B. F=m⋅(g+a)
C. F=m⋅g−m⋅a
D. F=m⋅g+m⋅a