Momentum (Explosion: Canon) || GCSE Physics This video covers Momentum [...]
Momentum (Explosion: Canon) || GCSE Physics
This video covers Momentum (Explosion: Canon). Momentum, kinetic energy and impulse can be used to analyse collisions between objects such as vehicles or balls. Forces ...and the final velocity of objects can be determined.
An introduction and tutorial to the topic for beginners, explains in a basic and simple way to learn and easy to understand. Designed to help with school learning and completing homework and exam practice.
This covers GCSE AQA 9-1: 4.5.7 Momentum (HT only) - 188.8.131.52 Conservation of momentum - In a closed system, the total momentum before an event is equal to the total momentum after the event. This is called conservation of momentum. • describe and explain examples of momentum in an event, such as a collision • (physics only) complete calculations involving an event, such as the collision of two objects. AT 1, 2, 3: Investigate collisions between laboratory trollies using light gates, data loggers or ticker timers to measure and record data.
Applies to all UK exam boards: Pearson Edexcel, OCR-A, OCR-B,AQA and international GCSE (IGCSE)
This video tutorial is designed to replicate and improve on other successful youtube channels such as Khan Academy, Freesciencelessons, Snaprevise, Examsolutions, The Organic Chemistry Tutor, Corbettmaths, Mathsgenie and others.
We hope you enjoyed our explanations and it has helped you to better understand Maths and Science.
Impulse and Change in Momentum - GCSE & A Level Physics
Why do you have to wear a seat belt in a car? Why is a car designed with a [...]
Why do you have to wear a seat belt in a car? Why is a car designed with a crumple zone? Impulse is equal to force times time. If you ...increase the time of impact, then the force will be reduced in a crash.
Script: The centre of mass of an object ...is the point where the entire weight of an object appears to act. Working out the centre of mass of a symmetrical object is easy; it’s simply the point where the lines of symmetry cross.
However it’s very unlikely that you’ll be dealing with such perfect shapes so you work it out by suspending the object freely, along with a plumb line. The centre of mass is always below the point of suspension, so by marking the vertical along the plumb line you know the centre of mass is somewhere along that line. By suspending the object from another point and repeating the process, you get two lines that intersect and the point of intersection is the centre of mass.
The position of the centre of mass is very important when it comes to the stability of an object. For example, a double decker bus is built to have a very low centre of mass and a wide base so that the line of action of its weight stays within the base when it goes around a sharp corner. If something has a high centre of mass combined with a small base then it is very unstable and will topple over with minimal effort.
A plumb line is an example of a simple pendulum. All it consists of is a weight attached to a piece of string that can swing freely. The time taken for it to swing from one side to the other and back again is called the time period. The time period of a pendulum of the same length is always the same no matter what height you release it from, which is what makes them so good at keeping time. The time period and the frequency are related by the formula: T = 1/f. So if a pirate ship at a theme park swung with a frequency of 0.2Hz then the time period would be 5s, which is one scary ride!
A moment is the turning effect of ...a force. It’s calculated by multiplying the force by the perpendicular distance between the force and the pivot. For example, by turning a spanner you are producing a moment. If you apply a force of 15N to the end of the spanner and the length of it is 0.1m, then the moment you are applying is 1.5Nm.
However you can apply a force that is not perpendicular, in which case the distance is not the length of the spanner but is the distance from the line of action of the force to the pivot. This will produce a smaller moment, so to produce the maximum moment, you need to apply force at 90 degrees.
Moments are often referred to as force multipliers because they reduce the force needed to perform certain tasks. You’ve probably all experienced this at some point in your lives but haven’t realised the reason why. Using a wheelbarrow is an example of a lever being used to reduce the effort necessary to lift the load. It works using the concept of balanced moments. An object is balanced when the sum of the clockwise moments about a pivot are equal to the sum of the anticlockwise moments about the same pivot.
For example, if a force of 300N is applied 2m from the pivot, and another force of 700N is applied on the other side of the pivot then it must be applied 0.86m from the pivot in order for the moments to balance. This means that you can apply small forces at further distances to achieve much greater forces on the other side. Which is why you’ll find it much easier to close your door from the handle rather than near the hinges.
http://www.physicshelp.ca GO AHEAD and click on this site...it wont hurt. [...]
http://www.physicshelp.ca GO AHEAD and click on this site...it wont hurt. Free simple easy to follow videos all organized on our website Key Words: Newton's third 3rd law dynamics mechanics free body diagrams physics ... lesson help fbd explained action reaction applied force[+] Show More
Practical C2 Finding mass of metre rule using POM
Defying Gravity While Balancing Forks!! (Scientific Experiment)
Today we have a fun home experiment in which we will defy gravity while [...]
Today we have a fun home experiment in which we will defy gravity while balancing forks. A fun home experiment that I encourage you try with your family and ...leave them in awe.
Everything you will need for this experiment can be found around the house: -Glass Cup -2 Forks -Tooth Pick -Lighter/Matchers
Instructions: 1. Interlock your 2 forks 2. Stick the toothpick through the center tightly 3. Balance the forks and toothpick on the edge of the glass 4. Take a moment to be amazed at the forks balancing on a tiny toothpick 5. Take your lighter and lite the end of the toothpick until it burns all the way to the glass
So have fun and make sure you subscribe for more cool experiments! =)[+] Show More
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Created by 301 Wen Hui
Created by 301 Wen Hui
A Common Misconception about Newton's Third Law Force Pairs (or Action-Reaction Pairs)
Proof that the Force Normal and the Force of Gravity are not a Newton’s [...]
Proof that the Force Normal and the Force of Gravity are not a Newton’s Third Law Force Pair.
0:00 Intro 0:26 Drawing the Free Body Diagram 1:02 Not a Newton’s Third Law Force ...Pair 1:37 The Force Normal Force Pair 1:55 The Force of Gravity Force Pair