Mass and Force

Mass:

Is a measure of the total quantity of matter in an object

Larger objects tend to have:

Greater mass

Some materials contain:

More mass than others per unit volume(are denser), so bigger does not always mean more massive.

Unlike the force of weight, why is mass not a vector quantity?

Because it has magnitude but no direction

For the purposes of mechanics, the most important thing to know about mass is:

It corresponds to how much force is required to achieve a particular acceleration

In other words, the more mass something has:

The more difficult it is to change its motion

The term inertia is sometimes used to refer to:

An object’s resistance to changes in its motion, but ______ is just a property of mass

A force is:

A push or pull

Earth’s gravity applies a force(weight) that always:

Pulls down, and it is what keeps objects and people on the ground instead of floating around in midair

All forces are:

Vector quantities and therefore act in a single direction

The term net force refers to:

The total force acting on an object

Without a force being applied to them:

Objects wouldn’t move(or, if they were already in motion, they would remain in motion without stopping)

Objects with a great deal of mass(such as a freight train):

Require a large force to alter their motion

The goal of all mechanical technology:

Is to most effectively apply all forces to the movement of varying mass quantities