Physics: Energy and Speed Time Graph Essay examples

Submitted By elmariab
Words: 936
Pages: 4
Open Document
General Science- Mechanics

Distance, Speed, Time (DVT)

Distance is a measure of how far away a point is. Measured in m/km

Speed is a measure of how fast an object is traveling. Measured in ms-1/kmh-1

Time is a measure of how long a period is taking. Measured in sec/hr

DVT Graphs- We can put information down into graphs that tell us a lot about how an object is moving.

The steeper the straight line the ‘higher’ the constant speed

The gradient of a straight line on a distance time graph gives the speed v=d/t OR v=rise/run

A ‘flat line’ means object is stopped/stationary

Curved line (upwards) acceleration away from the starting point

Curved line (downwards) deceleration/slowing down

Speed, Time graphs

A speed time graph that has a slope greater than zero shows an object accelerating

Graphs that show a straight line means a constant speed is being kept

Graphs that show a positive slop means the object is accelerating

Graphs that show a negative slope means the object is decelerating

The steeper the slope, the faster it is either accelerating or decelerating

Calculating Acceleration

To calculate the acceleration from a speed time graph you must calculate the slope the same way you would find the average speed distance time graph

Slope Y2-Y1= Y/X2-X1= X
Gradient= rise/run

Distance from area under graph

The total area under the slope represents the total distance

Area of a triangle= ½ x length x height
Area of square= length x height

Distance and Time- Revision

Motion is the way something is moving. The motion of an object such as a car/tennis ball is described using quantities like time, distance, speed and acceleration

Time (T), Seconds (S), Distance (D), Meters (M)

Speed

Average speed is a measure of distance traveled each hr/min/sec

Average speed= distance travelled/time taken

V= d/ t

Instantaneous speed- is the actual speed at any moment. The speedometer (speedo) in a car measures the instantaneous speed

Distance-Time graphs- Shows the time taken to travel a certain distance. The slope (gradient) of the graph gives info about the speed.

Slope (gradient)= change in y axis variable/ change in x axis variable

Slope= d/ t= Distance travelled/time taken

Acceleration- When a speed of an object changes, either by slowing down/ speeding up the object

Average acceleration- measures how much the speed is changing every hr/min/sec

Speed time graphs- give information about acceleration

The slope (gradient) of a graph of speed against time is found from slope= v/ t= change in speed/time taken= acceleration. The slope represents acceleration.

Force

A force can be defined as a push/pull/twist

Measured in newton’s (N)

A newton is equivalent to moving a 1kg mass, 1 metre

Force= mass x acceleration

N= kg x ms-2

Balanced and Unbalanced forces

Balanced Forces
Equal forces acting on one object in opposite directions

Acceleration is zero

Speed is constant

Net forces= 0 (no charge in motion)

Drawing forces on a diagram

Force, Mass, Acceleration

The heavier the object, the more force that is required to accelerate you

Acceleration-Gravity-10ms-2

Mass vs. Weight

Mass- amount of matter in a object measured in kilograms (kg)

Weight- measure of the force on an object due to acceleration caused by gravity measured in newtons (N)

Friction

Friction happens when an object moves against another. Friction always acts to oppose (or stop) the movement of an object. Types of friction include drag and air resistance. Friction generates heat, ‘causes wear and tear and slows moving
Show More

Related Documents: Physics: Energy and Speed Time Graph Essay examples

Mass and Appropriate Unit Essay

page(s) provided at the back of this booklet and clearly number the question. Check that this booklet has pages 2–13 in the correct order and that none of these pages is blank. YOU MUST HAND THIS BOOKLET TO YOUR TEACHER AT THE END OF THE ALLOTTED TIME. |For Assessor’s |Achievement Criteria | | |use only |…

Words 987 - Pages 4

What Is The Physics Of Everyday Phenomena

Physics 214 Physics of everyday phenomena Professor David H Miller Office room 376 millerdh@purdue.edu Course Web site http://www.physics.purdue.edu/academic_programs/courses/phys214/ Announcements, Syllabus, schedule, Lecture notes, practice exams Lists lecture schedule Times and place of the two evening exams Deadlines for Homework and Quizzes Use of the I clicker Useful information Undergrad Office Room 144, Questions, Handouts 8/17/2012 Physics 214 Fall 2012 1 This Week • Introduction…

Words 3305 - Pages 14

01 Introduction And How To Write Motion Essay

Grade 11 – Physics   Nuclear Engineering Thermal Hydraulics and Safety Analysis  Physics ◦ Attempts to explain and predict interactions between matter and energy ◦ Tiny: subatomic level – neutron, proton, electron and photon ◦ Gigantic: super macroscopic level – meteor, planet, stars and the universe.  Why is Physics important?  Two Models from Aristotle ◦ Movement of the objects on Earth  Four elements or essences: earth, water, air and fire.  A rightful place for all elements…

Words 1159 - Pages 5

Essay about Physics: Force and Www. Erikthered. Com / Tutor Pg

SAT Subject Physics Facts & Formulas This document is a concise but comprehensive guide to the facts and formulas typically used in the material covered by the SAT Subject physics test. The test is designed to determine how well you have mastered the physics concepts taught in a typical one-year college-prep high school course. This guide is mainly intended as a reference, as opposed to a full tutorial (which would probably be book-length), and so the explanatory material is pretty brief. You can…

Words 7303 - Pages 30

Potential Energy Essay

By the end of the day today, IWBAT… •Define and solve for Kinetic energy Launch: What is the definition of physics? Physics is the study of matter and matter’s relationship with force and energy. Monday 5 January Agenda  Launch/Kick Of 10 min 5% Reading 20 mins 50% Notes/Questions 20 mins 45% Homework: Read and Take notes: 8.4-8.5 Logistics   If you want to go over your test come in at lunch. Semester supplies       Get a spiral notebook/composition book for notes A pack…

Words 4041 - Pages 17

Essay on Sound Wave

Physics notes – Sound Free download and print from www.itute.com ©Copyright 2009 itute.com In the study of sound, we learn about the source, the medium and the receiver. Sound energy is transmitted from the source to the receiver via the medium. An example of the source is a tuning fork. It provides sound of a single frequency f. If the arms of the tuning fork vibrate 261 times in a second, we say its frequency of vibration is 261 Hz and the produced sound (vibration of the molecules in air, the…

Words 5436 - Pages 22

Essay on Chapter 6 Physics

PHYSICS 9th Edition John D. Cutnell &Kenneth W. Johnson 6. WORK AND ENERGY 6.1 Work Done by a Constant Force To move a body work must be done on the body. The product of force and the distance moved (s) in the direction of force (F) is defined as the work done (W). W = F.s Work done is a scalar quantity. SI unit of work done: joule (J) Point When the force and the direction of motion are inclined, the work done is calculated by the force component in the direction of motion and the distance moved…

Words 925 - Pages 4

Analyse Complex Problems To Determine Appropriate Ways In Which Each Aspect May Be Researched

You are not performing any numerical calculations, therefore you are qualitatively analysing the data. Quantitative analysis refers to analysing it in regards to numerical calculations. You may do an experiment where you change length and measure time. From this data you collect you may apply some mathematical formula to come to some conclusion. As you have performed calculations on this data, you have quantitatively analysing the data. Data is just data. On its own it is useless. You must analyse…

Words 5315 - Pages 22

Gcse Exam Science Essay

hij GCSE Additional Science Physics 2 Higher Tier Physics 2H SPECIMEN MARK SCHEME Version 1.0 Copyright © 2011 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number 3644723). Registered address: AQA, Devas Street, Manchester M15 6EX Quality of Written Communication and levels marking In Question 2(c) candidates are required to produce extended written material in English…

Words 1502 - Pages 7

Hamza: Gravitation and Gravitational Field Strength Essay

circular orbit, the only force acting on a satellite is the gravitational attraction between it and the central body. This force acting on it is always perpendicular to its motion. Therefore the energy of the satellite is unchanged as it orbits. The kinetic energy and gravitational potential energy both stay the same. The force of gravity holds the satellites in their orbits and causes them to have an acceleration towards the central mass. If the force of gravity could be 'turned off' then…

Words 3268 - Pages 14