In a collision, a 15 kg mass moving at 2m/s transfers all of its momentum to a 5kg mass. What is the velocity of the 5kg mass after collision?

Speed of 5 kg mass when momentum it transferred to it is 6 m/s

Explanation:

As we know that momentum is the product of mass and velocity of the object

So here we know that

now momentum of this object is given as

Now when it transfer all its momentum into the other object then we have

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.