A 75 kg astronaut is in space fixing a satellite when you need to consult the repair manual. So, a second
astronaut throws the manual in a straight line towards the first astronaut, at 3.0 m / s
in relation to spacecraft. Astronaut 1 is at rest in relation to spacecraft
before grabbing the 2 kg manual. Determine (in relation to spacecraft) (a) the
speed of astronaut 1 right after grabbing the book, (b) the initial kinetic energies and
end of the book-astronaut system and (c) the momentum exerted by the manual on the
astronaut. (d) Finally, determine the speed of the astronaut, before and after
grab the manual, in the reference center of mass of the manual-astronaut system.

does anyone know or what?

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.

the right answer is 0.3 meters per second

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: