In reality, inertia is making the body want to stay in place as the car moves forward. If an index card is placed on top of a glass with a penny on top of it, the index card can be quickly removed while the penny falls straight into the glass, as the penny is demonstrating inertia. When pulling a Band-Aid off, it is better to pull it fast. Your skin will remain at rest due to inertia, and the force pulls the Band-Aid off. Inertia of Motion Examples Objects in motion stay in motion or want to, just like these examples.
Seat belts tighten in a car when it stops quickly. Men in space find it more difficult to stop moving because of a lack of gravity acting against them. When playing football, a player is tackled, and his head hits the ground. The impact stops his skull, but his brain continues to move and hit the inside of his skull. His brain is showing inertia. If one drove a car directly into a brick wall, the car would stop because of the force exerted upon it by the wall. However, the driver requires a force to stop his body from moving, such as a seatbelt.
Otherwise, inertia will cause his body to continue moving at the original speed until his body is acted upon by some force.
When a baseball is thrown, it will continue to move forward until acted upon by gravity. The greater the force of the throw, the harder it is for gravity to act upon it. A hockey puck will continue to slide across the ice until acted upon by an outside force. When pedaling a bicycle, if you stop pedaling, then the bike continues going until friction or gravity slows it down. A car that is moving will continue, even if you switch the engine off. If a ball is on a slanted surface and you let go, gravity will make it roll down the slope.
It has inertia, and if there is a level area at the bottom of the slope, it will continue moving. When entering a building through a rotating door, inertia will allow the door to hit you in the back if you don't get out of the way. If you are rolling a cart with something on top and you hit something that makes the cart stop, what is on top may fall off. It is harder to stop a big vehicle, like a bus, than a smaller vehicle, like a motorcycle. There is more inertia with the larger object. While such forgivable indolence is not technically a formal example of inertia in the world of physics, this kind of lighthearted chatter about one's own supposed resemblance to a sloth is nevertheless illustrative of one of the most important concepts in all of applied physics.
If an object has more inertia, it requires more work to change its state, be it rest or a constant velocity. Correspondingly, objects with less inertia are in easier-to-change states.
One reason the "constant velocity" aspect may not be intuitive is the existence of friction. When you kick a ball down a field, it bounces and eventually rolls to a stop because of the friction of the turf. But if the playing field could be rendered frictionless, the ball would keep going forever at a constant velocity unless stopped by an outside force.
Needless to say, this state of things would also certainly affect the rules of play of ball games — and everything else — on Earth.
Isaac Newton remains the possessor of one of the most remarkable intellects in human history, having in effect assembled the mathematical discipline of calculus from scratch and contributing knowledge about the motion of bodies that inspired Galileo Galilei, a great architect of astrophysics ideas in his own right, and countless others. Newton's first law is sometimes called the law of inertia because it describes this tendency of an object as dependent on the presence or absence of an external force.
With no net force on a object, its motion will not change. As such, this law is not a contributor to the equations of motions also developed by Newton, perhaps helping to explain why some students are unfamiliar with it. This law relates net force in a system, including the direction, to the mass and motion of its particles. To calculate net force, you simply take the vector sum of all forces acting on the object.
Finally, Newton's third law asserts that for every force there exists an equal and opposite force in nature — the "equal and opposite reaction" also sometimes applied jokingly but tellingly in everyday language. The basic project of all of physics is understanding the motion of objects, including many the human eye cannot see and particles whose existence may be little more than a playful idea. The repeated beating of the carpet causes the dust particles to drop, thus, giving you a clean carpet.
Have you ever tried getting down from a moving bus? Well, if you have then you must know the result, but did you ever wonder why you fall forward and not backward? This is again due to the inertia of motion. When a passenger gets down from a moving bus, their upper body is still in motion, and when it comes in contact with the ground which is at rest, their body topples forward due to the inertia of motion. Ever noticed the continued swirling of milk even after you have stopped stirring a spoonful of sugar or cocoa in your milk?
It would not be wrong to say that it is due to the magic of inertia of motion, which keeps the milk moving inside the glass. You must have seen athletes running before taking a long jump but have you ever pondered on why they do so? Well, they do it to bring themselves in the inertia of motion from the inertia of rest. It makes it easier for them to take a long jump. Have you ever noticed why an object, when thrown outside a moving train, moves in the opposite direction and with an equal velocity to that of the train?
While driving along a curved road, you must have felt like you are flying out of the car. You must have experienced this trick of putting a coin into the glass without actually touching it.
It happens because when you suddenly pull the cardboard on which the coin is placed, it falls into the glass as it tends to remain in the state of rest.
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