I'm not sure, I think it's option A.
Let me know if I'm wrong!
The net force is the sum of the forces acting on an object ( chair ).
F net = F 1 + F 2
F 1 = 20 N, F 2 = - 12 N
F net = 20 N + ( - 12 N ) = 8 N
The chair will tend to move to the left.
Answer:
x = 102.33 m
Explanation:
Given that,
Position where a forest ranger stands is 35 m above the ground. The angle of depression to the base of the fire is 20. We need to find how far from the tower is the fire.
Let the distance is x. We can find x using trigonometry as follows :

Hence, the fire is at a distance of 102.33 m from the fire.
Gravitational potential energy is equal to (mgh) so 1.5•9.8•200=2940
Or C