Springs / Hooke's law /Energy

Slides:

Advertisements

Similar presentations

A simple model of elasticity

Advertisements

Hooke’s law. Calculate the force from a spring when given its spring constant and deflection. Calculate a spring constant given the required force and.

Kinetic Energy: More Practice

Physics 101: Lecture 20, Pg 1 Lecture 20: Ideal Spring and Simple Harmonic Motion l Chapter 9: Example Problems l New Material: Textbook Chapters 10.1.

Elastic potential energy

Simple Harmonic Motion & Elasticity

UNDERSTANDING ELASTICITY Elasticity A force can change the size and shape of an object in various ways: stretching, compressing, bending, and twisting.

A property of matter that enables an object to return to its original size and shape when the force that was acting on it is removed. Elasticity.

Elastic Force and Energy Stretching or Compressing a spring causes the spring to store more potential energy. The force used to push or pull the spring.

Energy stored in a Stretched String When stretching a rubber band or a spring, the more we stretch it the bigger the force we must apply.

Elastic Potential Energy & Springs AP Physics C. Simple Harmonic Motion Back and forth motion that is caused by a force that is directly proportional.

Mr. Jean April 27 th, 2012 Physics 11. The plan:  Video clip of the day  Potential Energy  Kinetic Energy  Restoring forces  Hooke’s Law  Elastic.

Hooke’s Law and Elastic Potential Energy

Foundations of Physics Assignment #12 Elastic Potential Energy Notes.

Periodic Motion. Definition of Terms Periodic Motion: Motion that repeats itself in a regular pattern. Periodic Motion: Motion that repeats itself in.

Energy 4 – Elastic Energy Mr. Jean Physics 11. The plan:  Video clip of the day  Potential Energy  Kinetic Energy  Restoring forces  Hooke’s Law.

Springs Web Link: Introduction to SpringsIntroduction to Springs the force required to stretch it  the change in its length F = k x k=the spring constant.

Hooke’s Law. In the 1600s, a scientist called Robert Hooke discovered a law for elastic materials. Hooke's achievements were extraordinary - he made the.

Since the graph is linear and contains (0,0) Force exerted by a spring vs. Elongation Review of an Ideal Spring.

Sect. 7-3: Work Done by a Varying Force. Work Done by a Varying Force For a particle acted on by a varying force, clearly is not constant! For a small.

Potential Energy Potential energy can also be stored in a spring when it is compressed; the figure below shows potential energy yielding kinetic energy.

Recall from Our Spring Lab that the Spring Constant (k) was the slope of the graph of Fs vs. x! Stronger Spring! The Spring constant or “Stiffness Factor”

Elastic Potential Energy Pg Spring Forces  One important type of potential energy is associated with springs and other elastic objects. In.

This section of work is also known as Hookes Law.

SIMPLE HARMONIC MOTION. STARTER MAKE A LIST OF OBJECTS THAT EXPERIENCE VIBRATIONS:

Hooke’s Law. English physicist Robert Hooke (1678) discovered the relationship b/t the hooked mass-spring system’s force and displacement. F elastic =

Spring Force. Compression and Extension  It takes force to press a spring together.  More compression requires stronger force.  It takes force to extend.

Elastic Potential Energy. Elastic potential energy is the energy stored in elastic materials as the result of their stretching or compressing. Elastic.

Chapter 14 – Vibrations and Waves. Every swing follows the same path This action is an example of vibrational motion vibrational motion - mechanical oscillations.

Elastic Energy SPH3U. Hooke’s Law A mass at the end of a spring will displace the spring to a certain displacement (x). The restoring force acts in springs.

Simple Harmonic Motion

Simple Harmonic Motion & Elasticity

Elastic Potential Energy & Springs

Elastic Potential Energy: Learning Goals

Hooke’s Law ?.

PHYSICS InClass by SSL Technologies with Mr. Goddard Hooke's Law

Physics 11 Mr. Jean November 23rd, 2011.

Elastic Potential Energy

Springs Forces and Potential Energy

Elastic Forces Hooke’s Law.

Elastic Potential Energy & Springs

Vibrations & Waves Part 1: Periodic Motion.

Elastic Potential Energy & Springs

Hooke's Law When a springs is stretched (or compressed), a force is applied through a distance. Thus, work is done. W=Fd. Thus elastic potential energy.

Why study springs? Springs are_____________. This means that if you:

Elastic Objects.

SCI 340 L25 Hooke's law A simple model of elasticity

ELASTIC FORCE The force Fs applied to a spring to stretch it or to compress it an amount x is directly proportional to x. Fs = - k x Units: Newtons.

Energy Spring Force & Elastic Potential Energy.

Work Done by a Varying Force

Elastic Potential Energy

Springs and Hooke’s Law

WALT: about Hooke‘s Law

Conservation Laws Elastic Energy

Elastic Potential Energy & Springs

A spring is an example of an elastic object - when stretched; it exerts a restoring force which tends to bring it back to its original length or equilibrium.

Simple Harmonic Motion

Hooke’s Law Elastic Potential Energy

Elastic Potential Energy & Springs

Recall from Our Spring Lab that the Spring Constant (k) was the slope of the graph of Fs vs. x! Stronger Spring! The Spring constant or “Stiffness Factor”

Aim: How do we characterize elastic potential energy?

F = k x Springs  Web Link: Introduction to Springs

A spring is an example of an elastic object - when stretched; it exerts a restoring force which tends to bring it back to its original length or equilibrium.

Hooke’s law Hooke’s law states that the extension of a spring force is proportional to the force used to stretch the spring. F ∝ x ‘Proportional’

Ch. 12 Waves pgs

Elastic Force – Hooke’s Law

Elastic Energy.

Hooke’s law Robert Hooke, in 1676, noted that for a spring, the extension was proportional to the load. It is now more generally stated that in certain.

Presentation transcript:

Springs / Hooke's law /Energy

A spring is an example of an elastic object - when stretched; it exerts a restoring force which tends to bring it back to its original length or equilibrium position. This restoring force is proportional to the amount of stretch, as described by Hooke's Law: Hooke's Law The minus sign indicates F is a restoring force – it is directed to restore the mass to its equilibrium position. The force constant k is equal to the slope of the Force vs. Stretch graph. Stiffer springs yield graphs with greater slopes. kA > kB

Stretching an Ideal Spring F x F x kx Work = Fx Ws =

Work done by a spring V= ? m m k x A certain spring that obeys Hooke's Law stretches 30 cm when a load of 0.35 N is added to it. How much energy is stored in the spring when it is compressed 5.0 cm? Work done by a spring V= ? m m k x