Aroadway is designed for traffic moving at a speed of 94 m/s. a curved section of the roadway is a circular arc of 740m radius. the curved section is temporarily replaced with an unbanked roadway of the same radius. the coefficient of friction of this roadway is 0.40. the maximum safe driving speed for this unbanked, curved section is closest to?

the answer is to check all of them! they all apply well at least i think so!

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.