The four main types of motion are translational, oscillatory, reciprocating and rotational motion. Some mechanisms use one type of motion for input but another type entirely for output.Know More
Motion is one of the most popular topics in physics, describing everything from the tiniest movement to something as large as the rotation of the a planet.
Over the centuries, scientists have discovered numerous laws that help us understand motion and the factors that cause changes in movement. Motion is driven by force, which is what gets things moving or changes the motion. Physicists use several criteria to measure motion. The speed at which an object moves, for example, is called velocity.Learn more about Motion & Mechanics
Friction is a force that opposes motion, so it is unhelpful in all situations where the motion of an object is desired. A by-product of friction is that energy is wasted in the form of heat, which can cause problems in temperature-sensitive environments.Full Answer >
A ball rolls because some force, such as gravity, the wind or a person's foot, acts upon it, setting it into motion. It continues to roll until some other force, such as friction, gravity or a barricade of some sort, causes it to stop.Full Answer >
In physics, "momentum" is a property that describes an object's motion. Linear momentum, the momentum of an object moving in a straight line, is the mass of the object multiplied by its velocity.Full Answer >
According to NASA, Newton's three laws of motion are: an object in motion tends to stay in motion, force equals mass times acceleration and for every action there is an equal and opposite reaction. Together, these three laws form the basis for classical mechanics.Full Answer >