I think it depend on the curvature of the reflective surface, right? if it is an Mirror, then the angles should mirror itself.
F-mg=ma
F-(12kg)(9.8m/s^2)=(12kg)(1.2m/s^2)
F-117.6N=14.4N
F=132 Newtons
Answer:
140 J
Explanation:
From the the question, the mass of the man =70.0 kg and the speed at which the man is walking =2.0 m/s.

where K.E = the kinetic energy, m=mass and v= speed.
By substitution,



Hence the kinetic energy of the man is 140J