Contact Forces

Non-contact forces

Contact and Non-Contact Forces

16. Contact & Non-contact Forces

Y8 FORCES booklet- Contact Forces & Pressure

Comprehensive Study Guide on Force, Contact Forces, and Field Forces

(6/11/26) Friction and Contact Forces

Microscopic Spring Models, Young's Modulus, and Contact Force Mechanics

Force and Motion: Magnets can push or pull without touching (non-contact forces). Magnetic Fields: The strength of magnetic forces depends on the distance between objects. Poles: Opposite poles attract, while similar poles repel.

Fundamentals of Forces and Vector Properties A force is an interaction that influences the physical state of an object. Forces are categorized as vector quantities, which means that the direction in which they act is important alongside their magnitude. Forces are measured in newtons ($$N$$). Because a force is a vector quantity, describing any force requires specifying both its numerical magnitude in newtons ($$N$$) and its direction of action. Classification of Forces: Contact and Non-Contact Forces are divided into two main categories depending on whether physical contact occurs between the interacting objects: contact forces and non-contact forces. A contact force is defined as a force that exists between objects that touch. Conversely, a non-contact force is defined as a force that exists between objects even if they are not touching, enabling interaction across a distance without physical surface contact. Effects of Forces on Motion and Shape Forces acting on an object can produce physical effects categorized into changing the object's motion or changing the object's shape. Forces acting on an object can change its motion in four distinct ways: by speeding it up, by slowing it down, by changing its direction of movement, or by causing it to rotate. Forces acting on an object can also change its shape. The three specific ways a force can alter an object's shape are by stretching it, by squashing it, or by twisting it. Resultant Forces and Free Body Diagrams When multiple forces act upon a single body, their combined effect is analyzed together. The overall effect of a set of forces acting on an object is represented by a single resultant force. To analyze and represent the forces acting on a system, a specific structural visual is utilized. A free body diagram is a diagram showing all of the forces acting on a single object. Newton's Third Law of Motion Newton's Third Law of Motion defines how forces interact between interacting bodies. According to Newton's Third Law of Motion, forces come in equal and opposite pairs which act on different objects. This law highlights that forces never exist in isolation on a single body; rather, paired equal and opposite forces always act on two distinct, different objects.

Chapter 5: Forces

Notes on Forces from Transcript (Contact vs Non-Contact; Systems/Agents)

Normal Force at Point Contact on Circular Hole

Page 1: Key Measurements in Physics Distance (d): The length of a path between its initial and final positions Scalar quantity SI unit: meters (m) Displacement (Δd): The net change in position of an object Vector quantity SI unit: meters (m) Average speed (s): The rate at which an object changes its location Scalar quantity SI unit: meters per second (m/s) Instantaneous speed: The speed of an object at a specific instant Scalar quantity SI unit: meters per second (m/s) Average velocity (v): The rate of change in position Vector quantity SI unit: meters per second (m/s) Instantaneous velocity: The velocity of an object at a specific instant Vector quantity SI unit: meters per second (m/s) Page 2: Final velocity (vf): The velocity of an object at a specific instant Vector quantity SI unit: meters per second (m/s) Initial velocity (vi): The velocity of an object at the start of its motion Vector quantity SI unit: meters per second (m/s) Acceleration (a): The rate of change in velocity Vector quantity SI unit: meters per second squared (m/s^2) Average acceleration: The rate of change in velocity over a given time interval Vector quantity SI unit: meters per second squared (m/s^2) Instantaneous acceleration: The acceleration of an object at a specific instant in time Vector quantity SI unit: meters per second squared (m/s^2) Weight (Fg): The measure of the force of gravity acting on an object with mass Vector quantity SI unit: Newtons (N) Coefficient of friction (μ): The ratio between the force necessary to move one surface horizontally over another and the pressure between the two surfaces Scalar quantity Page 3: Net force (Fnet): The sum of all the forces acting on an object in a given direction Vector quantity SI unit: Newtons (N) Newton's Second Law of Motion: Every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them Gravitational force (Fg): The force of attraction between every two objects due to their mass Non-contact force SI unit: Newtons (N) Normal force (Fn): The support force created by a surface when a force is applied Contact force SI unit: Newtons (N) Tension force (Ft): The force transmitted through an object when pulled by forces acting from opposite sides Contact force SI unit: Newtons (N) Applied force (Fa): A force which is applied to an object by another object; a push or pull Contact force SI unit: Newtons (N) Friction force (Ff): A force that opposes motion when two surfaces are in contact Contact force SI unit: Newtons (N) Page 4: Work (W): The transfer of energy to an object Scalar quantity SI unit: Joules (J) Power (P): The rate at which energy is transferred; the rate at which work is done Scalar quantity SI unit: Watt (W) Gravitational potential energy (GPE): Energy due to an object's position in a gravitational field Scalar quantity SI unit: Joules (J) Kinetic energy (KE): Energy due to the motion of an object Scalar quantity SI unit: Joules (J) Mechanical energy (ME): The sum of all the energy in an object Scalar quantity SI unit: Joules (J) Page 5: Types of Forces Gravitational force (Fg): The force of attraction between every two objects due to their mass Non-contact force Normal force (Fn): The support force created by a surface when a force is applied Contact force Tension force (Ft): The force transmitted through an object when pulled by forces acting from opposite sides Contact force Applied force (Fa): A force which is applied to an object by another object; a push or pull Contact force Friction force (Ff): A force that opposes motion when two surfaces are in contact

Exhaustive Notes on Force, Types of Forces, and Resultant Forces

Forces and Force Fields Study Guide

force

Forces

Force

FORCES