Serenity Now said:When playing foosball, what term should be used when a goalie shoots the ball and it is immediately blocked back into the goalie's own goal?
My friend continues to use the term reflection to describe this action.
Is this the correct usage of the term?
Loren Booda said:I would call it torque.
(Or perhaps "screwed.")
The coefficient of restitution, also known as COR, is a measure of a ball's bounciness. It is a numerical value that represents the ratio of a ball's outgoing velocity to its incoming velocity after colliding with a surface. A higher COR means a ball will bounce higher and with more energy, while a lower COR means a ball will bounce lower and with less energy.
An elastic collision is a collision in which both kinetic energy and momentum are conserved. This means that the total energy and momentum of the system before the collision is equal to the total energy and momentum after the collision. In an inelastic collision, some of the kinetic energy is lost and converted into other forms of energy, such as heat or sound. Momentum is still conserved, but not all of the original energy is retained.
Air resistance, also known as drag, is a force that opposes the motion of an object through the air. It can affect the motion of a ball by slowing it down and changing its trajectory. The amount of air resistance depends on the speed and surface area of the ball, as well as the density of the air. A more aerodynamic ball will experience less air resistance and travel further than a less aerodynamic ball.
Spin and rotation are often used interchangeably, but there is a subtle difference between the two. Spin refers to the movement of a ball around its own axis, while rotation refers to the movement of a ball around a fixed point. For example, a ball spinning on a table is rotating around the point where it touches the surface, but the ball itself is also spinning on its own axis.
The surface of a ball can greatly affect its motion. A smoother surface will have less friction and therefore travel further and faster, while a rougher surface will have more friction and travel shorter distances. The surface material can also affect the grip and bounce of a ball, as well as how it interacts with different playing surfaces. Factors such as temperature and moisture can also impact the behavior of a ball's surface.