is applied to a rigid body it changes the momentum of that body. If the momentum of an object changes‚ then either the mass or the velocity or both change. If the mass remains unchanged‚ as is most often the case‚ then the velocity changes and acceleration occurs. A force produces an acceleration‚ and the greater the force acting on an object‚ the greater its change in velocity and‚ hence‚ the greater its change in momentum. However‚ the change in momentum also depends on the duration of the force
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September 25‚ 2013 Physics Tutorial Tonometry for Intra-Ocular Pressure In the linear non-elastic collision of the rod with the eyelid‚ there are 4 notable forces in action (Figure 1). 1. The force (or pressure) of the rod (rod/size of rod) exerted is equal and opposite to the force (or pressure) the cornea re-exerting pressure on the rod. 2. The force (or pressure) required to applanate a constant area of a cornea is equal and opposite to the force (or pressure) of the rebound on the
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All planets except Mercury and Venus have at least one moon. Saturn has the greatest number of moons—18. In 1995‚ the Hubble Space Telescope detected what appeared to be four additional moons of Saturn; however‚ that discovery has yet to be confirmed. Planet | Number of Moons | Names of Moons | Mercury | 0 | | Venus | 0 | | Earth | 1 | The Moon (sometimes called Luna) | Mars | 2 | Phobos‚ Deimos | | Jupiter | 16* | Metis‚ Adrastea‚ Amalthea‚ Thebe‚ Io‚ Europa‚ Ganymede‚ Callisto
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Physics Preliminary 8.2 The World Communicates 1. The wave model can be used to explain how current technologies transfer information 1. Describe the energy transformations required in one of the following: – Mobile telephone – Fax/modem – Radio and television A. An energy transformation is a change in the type of energy‚ for example a change from sound energy to electromagnetic waves. Relating this to the mobile telephone‚ it undergoes basic energy transformations of‚ sound wave
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mass 0.01 kg at a speed of 200 m/s. The recoil velocity of the rifle is about 0.001 m/s. 0.1 m/s. 1 m/s ***(answer) 0.01 m/s. none of these You’ve given m1 = 2 kg v1 = ? m2 = 0.01 kg v2 = 200 m/s Set it up as a conservation of momentum problem m1v1 = m2v2 Insert values and solve
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Moving About Inertia: What is Inertia? Inertia is a property of matter that causes it to resist changes in velocity (speed and/or direction) (Rouse‚ 2005). Basically Inertia is a word we use when we talk about matter and movement (Unknown Author‚ Unknown Date). This idea goes all the way back to Sir Isaac Newton‚ a great physicist. In Newton’s first law of motion it is stated that: 1. An object at rests tends to stay in rest 2. An object in motion tends to stay in motion A great example
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the friction between the wheels of the cart and the ramp’s surface. The increase in friction would slow down the moving object (cart). Apparatus Trolley/cart- this is essentially a wooden block with wheels and a rubber end‚ to provide the collision with a cushion upon impact. Weights- these were added to the trolley every turn. This was the independent variable and it was the only variable we had chosen to change. Ramp- this is the means in which we are going to create the initial movement
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AS Level Physics: Terms & Definitions:- Measurement Random errors are errors of measurements that result in a scatter of readings about a mean value. Systematic errors are errors of measurement which occur according to some fixed patterns such that they consistently give out an over-estimation or under-estimation of the true value. Accuracy is a measure of how close the results of an experiment agree with the true value. Precision is a measure of how close the results of an experiment
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In 1686 Sir Isaac Newton developed three laws of motion. These laws are involved in every single football play. Whether it is a kickoff‚ pass‚ run‚ or extra point inertia‚ force‚ acceleration‚ momentum‚ and impulse are involved. Newton’s first law is the law of inertia and it states a body continues in its state of rest or of uniform motion unless an unbalanced force acts upon it. Some actions effected by this law are a quarterback throwing a football‚ a running back or receiver running for a touchdown
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temperature (negative temperature coefficient thermistors only) 15. Explain why‚ when there is an electric current in a resistor‚ there is an energy transfer which heats the resistor 16. Explain the energy transfer (in 2.12 above) as the result of collisions between electrons and the ions in the lattice 17. 2.14 Distinguish between the advantages and disadvantages of the heating effect of an
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