Define Inertia and Mass - Physics Assignment Help

Newton’s first law of motion defines that “an object at rest stays at rest and an object in motion stays in motion with the same speed in the same direction unless acted upon by an unstable force.” Objects tend to “keep on doing what they’re doing.” In fact, it is the usual tendency of objects to decline to accept modification in their state of motion. This tendency to oppose modification in their state of motion is illustrated as inertia.

Inertia: the resistance an object has to alter within its state of motion. 

Newton’s first law of motion state that force is NOT requires keeping a thing in motion. Slide a book across the table and observe, it slide to a respite position. The book in action on the tabletop do not come up to a rest point because of the lack of a force, relatively it is the existence of a force – the force of resistance – that fetches the book to a break position. In the deficiency of a force of friction, the book would persist in motion with the equal speed and direction perpetually. A force is not essential to keep a moving a book in action. Moderately it is a force (i.e. force of friction) that transmits the book to rest.

Mass as a Measure of the Amount of Inertia

All objects oppose modification in their state of motion because they have inertia. However some objects have more of a tendency to resist changes than others. The tendency of an object to resists changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the greater its mass. A more massive object has a greater tendency to resist changes in its state of motion.

Ex: suppose there are 2 bricks at rest on the table that look identical. However one brick consists of gold and the other brick consists of Styrofoam. Without lifting the bricks, you could tell which brick was the gold brick or Styrofoam brick by giving the bricks an identical push in an effort to change their state of motion. The brick that offers the least resistance is the brick with the least inertia, and therefore the brick with the least mass – the Styrofoam brick.

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