FORCES AND THEIR EFFECTS

Escolapios Albacete
Mind Map by Escolapios Albacete, updated more than 1 year ago
Escolapios Albacete
Created by Escolapios Albacete over 5 years ago
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Fuerzas y sus efectos. Peso y masa. Energía Mecánica. Principio de Arquímedes y Leyes de Newton

Resource summary

FORCES AND THEIR EFFECTS
1 Definition

Annotations:

  • A vector quantity that tends to produce an acceleration of a body in the direction of its application or a change of the direction that  the object is moving or a deformation of a body
2 Representation
2.1 Vectors

Annotations:

  • Vectors are usually drawn as arrows.
3 Types

Annotations:

  • Contact and Non-Contact forces Instantaneous and Constant forces
4 WEIGHT

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  • The weight of an object is the force of attraction that gravity exerts on it. Depends on: mass and gravity w = m x g
4.1 WEIGHT AND MASS

Annotations:

  • MASS is an invariable quantity that depends on the amount of matter. Mass is measured with a balance. WEIGHT depends on gravity. So, it changes with it. Weight is measured with a dynamometer.
4.2 Units

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  • SI: Newton 9.8 newtons = 1 kilopond
4.3 WEIGHT AND DENSITY

Annotations:

  • d = m/v w = V x d x g
5 UPTHRUST

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  • Depends on: - Volume - Density upthrust = V x d x g
5.1 ARCHYMEDES' PRINCIPLE Law of buoyancy

Annotations:

  • Archimedes' principle indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
5.1.1 Applications

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  • Boats and submarine
6 FORCES & MOTION
6.1 NEWTON'S LAWS
6.1.1 First Law

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  • An object in motion on which no forces act has uniform rectilinear motion.
6.1.2 Second Law

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  • A constant force exerted on an object gives it a constan acceleration that is directly proportional to the force and inversely proportional to the object's mass.
6.1.3 Third Law

Annotations:

  • When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
6.2 FORCES & EQUILIBRIUM

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  • An object is in equilibrium when the resultant of all the forces that act on it is nil.
6.3 FORCE & WORK

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  • Work is done when an object is displaced because a force acts on it, either partialy or completely in the same direction as the motion. W = F x d
6.3.1 Unit of work

Annotations:

  • Joule:  is the work done by an object that, subjected to a force of 1 N, is displaced 1 m in the same direction as the force.
7 ENERGY & WORK
7.1 MECHANICAL ENERGY

Annotations:

  • Objects have mechanical energy when they move at a certain speed or are displaced with respect to their position of equilibrium, or are at a certain height above the ground.
7.1.1 KINETIC ENERGY

Annotations:

  • EK is the energy that an object in motion has. it is depend on the mass of the object and how fast it moves (its speed)
7.1.2 POTENTIAL ENERGY

Annotations:

  • An object stores potential energy when it moves in the opposite direction to a force acting on it.
7.1.2.1 Elastic potential Energy
7.1.2.2 Gratitational Potential Energy
8 SIMPLE MACHINES
8.1 The Lever
8.1.1 Types of levers
8.2 Static or fixed pulley
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