institute. 1. Two particles‚ P and Q‚ of mass 2 kg and 1.5 kg respectively are at rest on a smooth‚ horizontal surface. They are connected by a light‚ inelastic string which is initially slack. Particle P is projected away from Q with a speed of 7 m s-1. (a) (b) Find the common speed of the particles after the string becomes taut. Calculate the impulse in the string when it jerks tight. (3 marks) (2 marks) 2. Particle A has velocity (8i – 3j) m s-1 and particle B has velocity (15i – 8j)
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What Is Physics and What Are Its Uses? Physics‚ a branch of science‚ is traditionally defined as the study of matter‚ energy‚ and the relation between them. The interaction between matter and energy is found everywhere. In order for matter to move‚ it requires some form of energy. Sports show many good examples of the relationship between matter and energy. For instance‚ a pitcher requires energy to throw a baseball at the incredible speed and accuracy that is needed to keep the batter from
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Elastic Collision between carts of equal mass: Collision 1 Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Momentum Initial (kg*m/s) Momentum Final (kg*m/s) Red Cart 2.0 + 50.0 0 0 0 Blue Cart 2.0 - 50.0 0 0 0 Elastic Collision between carts of unequal mass: Collision 2 Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Momentum Initial (kg*m/s) Momentum Final (kg*m/s) Red Cart 1.0 + 50.0 -33.33 50 -33.33 Blue Cart 2.0 - 50.0 66.66
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appointed Chancellor of Durham University. A Short History of Nearly Everything is a popular science book by American author Bill Bryson that explains some areas of science. Bryson describes the size of the universe‚ and that of atoms and subatomic particles. He then explores the history of geology and biology‚ and traces life from its first appearance to today’s modern humans. He discusses the possibility of the Earth’s being struck by a meteor‚ and reflects on human capabilities of spotting a meteor
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He also wrote a letter to Gandhi saying he wishes to meet him. Albert Einstein became very famous in history for introducing the theory of Relativity‚ birth of the nuclear power‚ nuclear fusion and fission‚ atomic bomb‚ and discovering subatomic particles. Albert Einstein had many accomplishments like: he did research while working as a clerk. He wrote a famous equation which was E=mc2 the equation showed a relationship between matter and energy. Albert Einstein also figured out and explained how
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magnitude and price of what’s been called the biggest and most expensive scientific experiment in human history is enough to instill fascination and excitement in even the most non-particle-physicists among us. Once it’s running at full capacity‚ the project’s researchers say‚ the $5.3 billion LHC‚ the biggest particle accelerator ever built‚ will be able to answer questions physicists never thought they’d get answers to‚ like why the universe formed the way it did and why matter has mass. Critics
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We can relate physics to softball in many different ways. It is actually hard to not think about the game of softball without some physics in mind. Specifically‚ the ideas of momentum and energy helps define the way softball works and why it works. Momentum Running: When running the bases in softball‚ there is a lot more to it then the average person would think. While we run the bases‚ we are changing our momentum by applying more force‚ the force of friction‚ onto the ground which causes more
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Minela Sljoka Notes on Physics Inertia- tendency of an object to maintain motion. Property of matter. Not newton’s first law. Matter wants to maintain motion- moving objects want to stay in motion if stopped wants to stay stopped. Mass is measure of inertia. Things have mass because they have inertia. Units: kg Symbol m in equation. Inertia is most constantly called rest mass but we call it mass because we are dealing with speeds not going to speed of light. Kinetic Energy- v^2 is proportional
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------------------------------------------------- Physics syllabus dot point summary Nathan Kulmar ------------------------------------------------- Physics syllabus dot point summary Nathan Kulmar 8.2.1.1 describe the energy transformations required in one of the following: – mobile telephone – fax/modem – radio and television Energy is stored as chemical energy in the phone’s battery. Chemical energy is transformed into electrical energy to operate the phone. The microphone
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radioactive nucleus can decay and reach a more stable state. Alpha Decay The most common way for a nucleus to become stable is by alpha radiation. Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle and creates a new isotope. The alpha particle is the nucleus of helium‚ two protons and two neutrons. This radiation is usually emitted by the heaviest elements. Beta Decay This occurs when there are an excess
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