100 points. I need the answers PLEASE! (this is part of my test, and I have no idea what I am doing.) Will mark brainiest if you answer, this is one of my few questions. Bryan and Marc are two of my Ironman buddies and they have just had their fill at a local Subway and decide to do some Physics. Bryan has a mass of 85.0 kg with a pair of roller blades on. Marc pulls Ryan 5.00 m with a constant force and it takes him 7.66 s to accelerate Bryan from rest.

Calculate Average speed:

What was his initial speed (rest)? Vi

Calculate his final speed Vf. V=Vf+Vi

Calculate his acceleration.

Calculate the effective force Marc had on Bryan. F=ma

Please don't give out so many points

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.