An object of mass 13kg is falling in air and experiences a force due to air resistance of 9N. Determine the magnitude of net force acting on the object.

Given data

mass (m) = 13 kg

F₁ = 13 * 9.8 = 127.4 N

air resistance (F₂) = 9 N, acts in opposite direction

Net force is defined as sum of all forces

Fnet = F₁ - F₂

= 127.4 - 9

= 118.4 N

Net force acting on the object is 118.4 N