Because rectilinear motion takes place in one straight line, examples include a train following a straight set of tracks, a baseball thrown in a gravity-free vacuum or a penny that someone drops from the top of a tall building, heading straight to the ground. Rectilinear motion is the opposite of curvilinear motion, which involves movement along a fixed curve.Know More
When studying physics, the most common examples of rectilinear motion use falling objects. Because of the effects of gravity and friction on anything moving in a horizontal direction, having those objects continue to move in a perfectly straight line is extremely unlikely. Even in the case of the train, having a perfectly straight track for the complete duration of the trip is not a realistic scenario. However, tracking a falling object involves a straight line, because gravity forces that object to take the straightest path to the ground.
Other physics problems examine the effects of forces such as gravity on an object's rectilinear motion. One common example involves shooting a projectile up into the air. Whether one shoots the object straight up, perpendicular to the ground, or at an angle, gravity almost immediately begins to take effect, slowing the projectile down and, in the case of the angle, turning the rectilinear path into a curvilinear one.Learn more about Motion & Mechanics
Tissue breaks apart in water, but not if thrown off a tall building. This is mainly due to the tissue's molecular structure and the high amount of air resistance.Full Answer >
Uniform linear motion is motion that occurs in one dimension of space at a constant speed and direction. It is a key principle of physics, directly related to Newton's first law.Full Answer >
Inertia is the quality a mass, or any object, has that keeps it still, if it is not moving, or in motion, if it is in motion. The relationship between mass and inertia has much to do with the first two laws of physics by Isaac Newton, which are that an object at rest will tend to stay at rest and an object in motion will tend to stay in motion.Full Answer >
The law of inertia is a fundamental physics principle used to describe how an object behaves in motion or at rest, particularly when forces are applied to it. The object can be anything that has mass.Full Answer >