A sled of mass 49.0 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.30, and the kinetic friction coefficient is 0.10. 1. How much force will be needed to start the sled moving? N II. How much force is needed to keep the sled moving at a constant velocity? N III. Once moving, how much force must be applied to the sled to accelerate it at 3.3 m/s2? N For all responses, give three sig figs. (NOT three decimal values)​

where’s the list ? the question is incomplete

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

your answer is, orbit around the nucleus