Linear Momentumand Collisions

العاشرة المحاضرة

Linear Momentumand Collisions

Chapter 9

Linear Momentum and Its Conservation

Definition of linearmomentum of a particle

The linear momentum of a particle or an object that can be modeled as a particle of mass m moving with a velocity v is defined to be the product of the mass and velocity:

Definition of linearmomentum of a particle

linearmomentum of a particle

7.3 The Scalar Product of Two Vectors

Using the definition of momentum

Impulse and Momentum

The impulse of the force F acting on a particle equals the change in the momentum of the particle.

Impulse and Momentum

problem1

Example 9.4 How Good Are the Bumpers?

Collisions in One Dimension

elastic collision between two objects is one in which the total kinetic energy (as well as total momentum) of the system is the same before and after the collision.

An inelastic collision is one in which the total kinetic energy of the system is

not the same before and after the collision (even though the momentum of the

system is conserved).

momentum of the system is conserved in all collisions, but kinetic energy of the system is conserved only inelastic collisions.

Collisions in One Dimension

Inelastic Collisions

Elastic Collisions

Example 9.8 A Two-Body Collision with a Spring

Problem7

Problem15