Resistive forces include friction, air resistance and drag forces.Drag is the friction from fluids like air and water.Drag is the fluid resistance, a force acting opposite to the relative motion of any object that moves relative to the surrounding fluid.Drag forces increase with the speed of the solid object in the fluid's path.Drag force is proportional to the velocity of low-speed flow, and the squared velocity for high-speed flow.
Work done against the resistive forces increases the internal energy of the surroundings.
Work done against the resistive forces increases the internal energy of the surroundings.