• YOOKUNG
In summary, the conversation discusses the phenomena of collision and water, specifically in relation to the motion and behavior of objects. The speaker is seeking a better understanding of concepts such as momentum and energy in relation to this topic. They also mention the observation of water in a ball during a second bounce, and how it affects the height of the bounce. Overall, the speaker is looking for further explanation and clarification on these topics.
YOOKUNG
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About motion of collision and water in ball // why object show that ? I not sure about momentum and energy ,i would like more explain.

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On the 2nd bounce the water in the ball doesn't get a chance to "bounce" like it did the first time, so it comes crashing down after the ball is already in the air, keeping it from bouncing as high.

I explain from Pi = Pf or (m+M)u =(m+M)v, ? not sure

## 1. What is a collision?

A collision is a physical event in which two or more objects come into contact with each other with significant force. This can result in a change in the objects' motion or shape.

## 2. How does a collision in water differ from a collision in air?

Collisions in water involve resistance from the surrounding fluid, which can slow down or alter the motion of the objects involved. In contrast, collisions in air typically have less resistance and result in a quicker rebound of the objects.

## 3. What causes the phenomena of splashing when objects collide in water?

Splashing is caused by the transfer of momentum from the colliding objects to the surrounding water. This creates waves and ripples on the surface of the water, resulting in the splashing effect.

## 4. How does the density of the objects affect collisions in water?

The density of the objects involved in a collision can greatly impact the resulting phenomena. Objects with higher densities will experience more resistance and a slower rebound, while objects with lower densities will experience less resistance and a quicker rebound.

## 5. Can you explain the concept of buoyancy in relation to collisions in water?

Buoyancy is the upward force exerted by a fluid on an object that is partially or fully submerged in it. In collisions in water, buoyancy can affect the motion and outcome of the collision, as the density and shape of the objects involved will determine the amount of buoyant force they experience.

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