# Momentum and Collisions

Momentum can be understood by looking at the mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast and velocity of an object. Mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast is a property of an object that measures the amount of matter in an object. Velocity is the amount of distance an object travels over a given time. It is a vector quantity so directionality is also expressed. Momentum is the product Product A molecule created by the enzymatic reaction. Basics of Enzymes of mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast and velocity, also a vector quantity. In practicality, momentum refers to the quantity of motion possessed by an object. The unit of momentum is kilogram-meter per second (kg-m/s).

Last updated: Mar 8, 2022

Editorial responsibility: Stanley Oiseth, Lindsay Jones, Evelin Maza

Contents

## Momentum: Definition

Momentum is a vector quantity used to describe the motion of an object. Its direction is parallel to the motion of that object.

p = m v

p ⇒ momentum (kg m/s or N s)
m ⇒ mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast (kg)

### The law of conservation of momentum

The law of conservation of momentum states that in an isolated system that does not have any interaction with its environment, all momentum is constant. When 2 objects collide, the total momentum of these 2 objects before the collision is equal to their total momentum after the collision.

### Impulse

Impulse can be defined as the change in momentum over time caused by an average force. It is defined as follows:

I ⇒ impulse (kg m/s)

Fav ⇒ average force (N or kg m/s2)
p ⇒ momentum (kg m/s or N s)
Δt ⇒ duration of the impulse (s)

### Moment of Inertia

A static/rigid body has resistance Resistance Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow. Ventilation: Mechanics of Breathing. Once a force sets a rigid body in rotating motion, a moment of inertia occurs. Moment of inertia depends on the body’s mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast distribution in relation to the axis Axis The second cervical vertebra. Vertebral Column: Anatomy.

J ⇒ moment of inertia (kg m2)
r ⇒ axis Axis The second cervical vertebra. Vertebral Column: Anatomy of rotation Rotation Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. X-rays
ρ ⇒ mass Mass Three-dimensional lesion that occupies a space within the breast Imaging of the Breast distribution

### Angular momentum

Angular momentum can be thought of as ‘swirl’ or ‘spin’. It describes the direction and speed of a rotation Rotation Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. X-rays about an axis Axis The second cervical vertebra. Vertebral Column: Anatomy. Angular momentum increases under the following conditions:

The following equation defines angular momentum:

L = r p

## Collisions

### Central collision

Δp ⇒ collision [(kg m)/s]

A collision can be defined as a change in momentum over time. The following equation defines collision:

Δp = F Δt

There are 2 types of collision:

If the centers of gravity of the colliding bodies move along a straight line, such collision is defined as a straight-line central collision. Inelastic and elastic Elastic Connective Tissue: Histology collision Image by Lecturio.

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