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Center of Mass : Introduction 0/4
Momentum Conservation & Collision 0/4
Collision & Impulse : Introduction
Collision is a momentum transfer process. By momentum transfer we mean change of velocities of one or more objects.
When two objects interact for a relatively short time and relatively higher magnitude of force act between them, they both are said to be in collision.
Types of collision
- One-dimensional collision
- 2-D collision
- 3-D collision
When the colliding objects move along the same line before and after collision than a collision is called as one-dimensional collision. For example two objects collide on x-axis and remains on x-axis after collision.
When the plane of motion is same before and after the collision than the collision is called two-dimensional collision. For example two objects are in xy plane before collision and remains on xy plane after collision as well.
When the plane of motion changes after the collision than the collision is called three-dimensional collision.
Collision process is also divided into three parts,
1. Head-on collision
When the line of motion and the line of impact are the same line before and after the collision than collision is called as head-on collision.
2. Oblique collision
When the line of impact makes an angle other than 0° or 180° with the line of motion than the collision is called as oblique collision.
Line of impact
The line along which impact forces act is called line of impact.
The line passing through the contact point and along the common normal is called as line of impact. (Normal of collision)
Impulse is defined for a time interval. Impulse can only be generated by forces which are very high in magnitude. Usually this forces acts for very short duration.
Impulse is a vector quantity. Direction of impulse is the direction of force.
Impulse are always equal and opposite.
Net sum of internal impulse is always zero.