Throwing a football When the football travels through the air for a long pass it always follows a curved path because the force of gravity influences the movement of the ball in the vertical direction. As the ball travels up‚ gravity slows it down until it stops briefly at its peak height; the ball then comes down‚ and gravity accelerates it until it hits the ground. Projectile motion is the path of any object that is launched or thrown and has an arched course (howstuffworks) For the football
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WHAT IS TORQUE? Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis‚ which we will call the pivot point‚ and will label ’O ’. We will call the force ’F ’. The distance from the pivot point to the point where the force acts is called the moment arm‚ and is denoted by ’r ’. Note that this distance‚ ’r ’‚ is also a vector‚ and points from the axis of rotation to the point where the force acts. (Refer to Figure 1 for a pictoral
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is an impulse. This is the force multiplied by the length that this force is applied. Impulse = 10‚000N multiplied by 0.0005s / 0.046kg = 108.69 This would mean that the ball is moving
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An impulse is something that changes an objects momentum‚ and is the product of force and the time which that force acts. Impulse is expressed in the equation Impulse=Ft‚ where F is the force and t is the time on which that force is applied. Impulse is essentially the change in momentum of an object. If we a car with a mass of 1500kgs was driving at a velocity of 20ms-1‚ its momentum would be 30‚000kgms-1. If we assume that this vehicle crashed
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this. I am assuming finding velocity is the sole purpose of applying the law of conservation of momentum. Is this true? I also would like to note that a graph could not be drawn in some situations again due to me lacking the technology to send photos of handwritten notes. Hence there is sadly no examples of a problem for translational equilibrium and for the force-time graph in which impulse can be identified. I also have referred to explosions as divisions. Is this appropriate? Newton’s
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various safety precautions taken. Because when an object stops‚ or is stopped by a collision‚ the same change in momentum occurs no matter the size of the force or the time interval‚ these sheets of metal are critical to the passengers safety. The metal sheets not only absorb energy from the oncoming vehicle‚ but they also slow it down; and because the change in momentum is equal to the impulse‚ the longer it takes for a force to reach the passenger‚ the smaller the force will be. Another safety feature
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Momentum and Simple 1D Collisions PhET Lab Introduction: When objects move‚ they have momentum. Momentum‚ p‚ is simply the product of an object’s mass (kg) and its velocity (m/s). The unit for momentum‚ p‚ is kgm/s. During a collision‚ an object’s momentum can be transferred to impulse‚ which is the product of force (N) and time (s) over which the force acts. This allows us to write the momentum-impulse theorem: Procedure: Play with the Sims Physics Motion Collision Lab Work with 1D collisions
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Romar M. Cabinta EXERCISES 15 WORK‚ ENERGY‚ AND POWER A. CONCEPTUAL QUESTIONS 1. Is work done when you move a book from the top of the desk to the floor? Why? Yes. It is because the displacement of the book from the top of the desk to the floor and the force that is applied to the book is parallel with one another. 2. State the law of Conservation of Mechanical Energy in two ways? The law of conservation of energy states that energy may neither be created nor destroyed.
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they are inversely proportional Chapter 8: 1. F. Impulse =momentum 2. T. Momentum is conserved only 3. T. A whale shark swimming at 4. T. Momentum is the product 5. F. Impulse is the product 6. A. 26400kg(m/s) 7. C. 500kg(m/s) 8. A. 500Ns 9. B. 500N 10. C. 8m/s 11. C. it has neither large mass 12. A. energy 13. B. the impulse required…is greater 14. D. elastic and inelastic 15. A. the Pelton wheel Chapter 9: 1. F. Momentum and Kinetic 2. T. Total energy of a system 3. F. It
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energy than mass. Still objects have no kinetic energy. Hint: Energy variables are capital Momentum proportional to mass and velocity p=mv Units= kg time m/s And is vector in as direction as velocity Conservation laws are applied in closed systems only Collisions are closed Momentum is conserved///// total energy is conserved Momentum always conserved in collisions thus collision problems are aways momentum problems Total energy is always conserved Types of collisions: Elastic collisions Kinetic energy
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