Unit 4: Systems of Particles and Linear Momentum

center of mass

The point in an object where all the mass is concentrated and the object can be balanced. It is also the point where an external force can be applied to cause translational motion without causing any rotational motion.

Center of Gravity

The point where the entire weight of an object can be considered to be concentrated

Center of Mass

The point where the mass of an object is concentrated, taking into account the distribution of its mass. It is the balance point where an object can be supported without any rotation.

Impulse

A force that causes a change in an object's motion. It is equal to the change in momentum of the object over time.

Momentum

The product of an object's mass and velocity. It describes the amount of motion an object has and is conserved in a closed system unless acted upon by an external force.

Linear momentum

The product of an object's mass and velocity, which determines the amount of motion it possesses in a straight line.

Conservation of Linear Momentum

The principle that states that the total momentum of an isolated system remains constant unless acted upon by an external force.

Collisions

It occurs when two or more objects come into contact with each other, resulting in a change in motion or deformation of the objects involved. It can be elastic or inelastic, and can be analyzed using the principles of conservation of momentum and energy.