Kinetics and Forces in Movement

These flashcards cover key concepts relating to kinetics and forces, essential for understanding movement dynamics in sports and physical activities.

Impulse-Momentum Theory

Theory that states the longer you can push off, the more momentum you will generate.

Normal Force

The force exerted by a surface to support the weight of an object resting on it, always acts perpendicular to the surface.

Gravity

A force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Conservative Forces

Forces that do not depend on the path taken; they keep the same pathway and can return to their original state.

Non-conservative Forces

Forces that depend on the path taken and cannot return energy to the system.

Ground Reaction Forces

Forces generated by the body acting on the ground and vice versa, crucial in understanding movement dynamics.

Friction

The resistance that one surface or object encounters when moving over another; friction forces are typically proportional to the normal force.

Fluid Dynamics

The study of how fluids (liquids and gases) move and the forces acting on them, important for understanding drag and lift.

Newton's First Law (Law of Inertia)

An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by a net external force.

Newton's Second Law

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Newton's Third Law

For every action, there is an equal and opposite reaction.

Static Friction

The frictional force that prevents two surfaces from sliding past each other, typically greater than kinetic friction.

Kinetic Friction

The frictional force that opposes the motion of two sliding surfaces.

Coefficient of Friction

A numerical value that represents the frictional interaction between two surfaces, affecting both static and kinetic friction.