Spring Notes.

Slides:

Advertisements

Similar presentations

Energy Chapter 5 Section 2. What is Energy? Energy – A scalar quantity that is often understood as the ability for a physical system to produce changes.

Advertisements

Springs And pendula, and energy. Spring Constants SpringkUnits Small Spring Long Spring Medium spring 2 in series 2 in parallel 3 in series 3 in parallel.

Springs And pendula, and energy. Harmonic Motion Pendula and springs are examples of things that go through simple harmonic motion. Simple harmonic motion.

Aim: How can we calculate the energy of a spring? HW #33 due tomorrow Do Now: An object is thrown straight up. At the maximum height, it has a potential.

Springs and Hooke’s Law

Regents Physics Springs.

ADV PHYSICS Chapter 5 Sections 2 and 4. Review  Work – force applied over a given distance W = F Δ x [W] = Joules, J  Assumes the force is constant.

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 Chapter 5 Section 2.

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 The Physics of Springs.

Mechanical Energy. Kinetic Energy, E k Kinetic energy is the energy of an object in motion. E k = ½ mv 2 Where E k is the kinetic energy measured in J.

Work and Energy Energy Chapter 5: Section 2. Learning Targets Identify several forms of energy Calculate kinetic energy for an object Distinguish between.

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.

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

Elastic P E This is the stored energy of any stretched or compressed object. You can find the EP E of an object by taking the object’s stretch (x) and.

Spring Force and Energy Notes

Work and Energy Physics 1. The Purpose of a Force  The application of a force on an object is done with the goal of changing the motion of the object.

Chapter 12 Vibrations and Waves. Periodic Motion Any repeated motion Examples?

Physics Section 5.2 Define and apply forms of mechanical energy. Energy is the ability to do work. Kinetic energy is the energy of an object due its motion.

Springs and Hooke’s Law Physics 11. Springs A mass-spring system is given below. As mass is added to the end of the spring, what happens to the spring?

Energy – the ability to do work W = Fd = m a d V f 2 = V i 2 + 2a  x V f 2 - V i 2 = + 2a  x V f 2 - V i 2 = a  x 2.

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.

Energy Stored in springs E p = 1 / 2 kx 2 Where: E p – potential energy stored in spring (J) k – spring constant (N/m) x – amount of stretch/compression.

Potential Energy Stored energy due to the relative position of an object In the field of a field force (i.e., gravity, electrostatic, magnetic) In relation.

Energy and Work. Work… Work = Force // x Displacement W = F // x d ** Remember that displacement is the distance AND direction that something moves. It.

Energy of Simple Harmonic Motion

Physics Section 11.1 Apply harmonic motion

Unit 7: Work, Power, and Mechanical Energy.

Elastic Potential Energy: Learning Goals

Springs And pendula, and energy.

Definitions The scientific definition of work is a force exerted over a distance (work = force · distance) work - The scientific definition of energy is.

What energy is propelling these teenagers into the air?

Chapter 5.2 Notes Potential Energy.

1a i) KE = ½ x mass x speed2 1a i)

Rollercoaster A 1700 kilogram rollercoaster operating on a frictionless track has a speed of 5 meters per second as it passes over the crest of a 35 meter.

Elastic Potential Energy

Physics 11 Mr. Jean November 23rd, 2011.

Energy. Energy Energy (def.) the ability to do work. Unit is Joules. Work and energy are interrelated. Work must be done on an object to get it to.

Elastic Forces Hooke’s Law.

KE and PE Practice Quiz Solutions.

April 8, 2009 What is the potential energy in the following situations: 4 kg object at a height of 6 m 4 N object at a height of 6 m Fill in the blanks:

P2.3 Forces in Action.

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.

Elastic Objects.

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.

Baseline (Aiming for 4): State the factors

Springs and Hooke’s Law

Gravitational field strength = 9.81 m/s2 on Earth

Mechanical Energy, Me (Units of joules (J))

Chapter 5 Review.

Sect. 7.6: Potential Energy

Simple Harmonic Motion

Simple Harmonic Motion

Hooke’s Law Elastic Potential Energy

Sect. 7.6: Potential 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”

Aim: How do we characterize elastic potential energy?

Force and Motion (H) Newton's second law. Inertia. Weight.

Ch. 12 Waves pgs

Elastic Energy.

Chapter 5, Unit 2: Kinetic & Potential Energy

Example 1 When a mass of 24kg is hung from the end of a spring, the length of the spring increased from 35cm to 39cm. What is the load on the spring in.

Ch 4 Energy Kinetic Energy (KE) – the energy a moving object has because of its motion; depends on mass and speed of object KE = mv2/2 Joule – SI unit.

Presentation transcript:

Spring Notes

Hooke’s Law Definition: Equation: K Values Large K values = Small K values = The extension (stretch) of a spring is directly proportional to the force applied to it Fs = kx Fs = Force in the spring (N) K = Spring constant (N/m) X = Stretch/compress distance (m) Stiff spring  takes a lot of force to stretch Loose spring  very little force needed to stretch

Elastic Potential Energy (EPE) Definition: Equation: *Which kind of spring would store more energy? Stiff or loose? Explain why. The energy stored in an elastic object when it is stretched EPE= ½ kx2 K = Spring constant (N/m) X = Stretch/compress distance (m) Stiff spring because takes a lot more force to stretch it.

2058 2058 2058 2058 GPE=70(9.8)(3) GPE= 2058 J Total=2058 J Practice Problems 1. Rich (70kg) is jumping off his garage again (3m high), but this time he is landing on a trampoline. The spring constant for the trampoline is 6000N/m. a.) Draw an energy chart to show the GPE, KE, TE, EPE and total energy at the beginning and end of his motion. b.) Calculate PE, KE, TE, EPE and Total Energy at the beginning and end of his motion. Add to the chart above. c.) Calculate Rich’s velocity at the end of his motion. Beginning End GPE KE TE EPE Total 2058 2058 2058 2058 GPE=70(9.8)(3) GPE= 2058 J Total=2058 J 2058=1/2(6000)x2 2058=3000x2 .686=x2 x=.83 m EPE=1/2 kx2