The better-known forms of motion include rotary motion (turning round in a circle), linear motion (moving in a straight line), reciprocating motion (moving backward and forward in a straight line), oscillating motion (swinging from side to side), irregular motion (moving with no obvious pattern) and uniform motion (moving at constant speed in a straight line). Kinematics is the science that studies the motion of objects.Know More
Motion is movement, and it can also be defined as a continuous change in the position of an object along a specific vector. Each type of motion is controlled by a different type of force.
There are two types of basic motion. Translation means motion along a path and is defined by the net force (the sum of different forces) acting on an object, while rotation means motion around a fixed axis and is defined by torque (force that causes the rotation of an object).
Many mechanisms take one type of input motion and output it as a different type of motion. For example, a chain and sprocket changes rotary motion to linear motion. A cam and follower changes rotary motion to reciprocating motion, and a peg and slot changes oscillating motion to rotary motion.Learn more in Motion & Mechanics
Uniform motion describes an object that is moving in a specific direction at a constant speed. While uniform motion typically describes objects moving in a straight line, uniform circular motion consists of an object moving in a perfect circle at a constant speed.Full Answer >
Air resistance, also called drag, acts upon a falling body by slowing the body down to the point where it stops accelerating, and it falls at a constant speed, known as the terminal velocity of a falling object. Air resistance depends on the cross-sectional area of the object, which is why the effect of air resistance on a large flat-surfaced object is much greater than on a small, stream-lined object.Full Answer >
When an object reaches its terminal velocity, it can no longer accelerate, so its acceleration becomes zero, and it falls at a constant speed. As an object falls freely through the air, it has two forces acting upon it: gravity and drag.Full Answer >
Weight affects friction in that friction is directly proportional to the weight of the load one is moving. If one doubles the load being moved, friction increases by a factor of two.Full Answer >