A perfectly blank collision occurs when two objects stick together and kinetic energy is lost

A perfectly inelastic collision occurs when two objects stick together and kinetic energy is lost.

Explanation:

An inelastic collision, as opposed to a flexible collision, is an impact where active vitality isn't monitored because of the activity of inward grating. In crashes of plainly visible bodies, some dynamic vitality is transformed into vibrational vitality of the molecules, causing a warming impact, and the bodies are disfigured.

An inelastic collision is one in which some portion of the active vitality is changed to some other type of vitality in the crash. Any macroscopic collsion between articles will change over a portion of the active vitality into interior vitality and different types of vitality, so no huge scope impacts are flawlessly versatile.

michelle

Explanation:

magnityde and direction

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.