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rove that the work done on a body in accelerating it from an initial velocity (v) to a final velocity (v2) is qual to the change in kinetic energy of bodyt ind the Power required (in KW), to accelerate a car from zero to 8o Kmh in 20 seconds on straight- me road? If the mass of a car is 900 kg?

rove that the work done on a body in accelerating it from an initial velocity (v) to a final velocity (v2) is qual to the change in kinetic energy of bodyt ind the Power required (in KW), to accelerate a car from zero to 8o Kmh in 20 seconds on straight- me road? If the mass of a car is 900 kg?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Q.3: (20 PL.) Consider a system of mass m for which AU = 0, APE = 0, and Q = 0. Physically, this might correspond to a system with constant internal energy, held at constant height, and with no heat exchanges with its surroundings. For this system, the first law gives a balance between changes in kinetic energy and work. In addition, let us assume that a horizontal force F is accelerating the system as it acts through a distance in the x direction. Assume there is no friction force. F- m A. Prove that the work done on a body in accelerating it from an initial velocity (vi) to a final velocity (v) is equal to the change in kinetic energy of bodyt B. Find the Power required (in KW), to accelerate a car from zero to 80 Km/h in 20 seconds on straight- line road? If the mass of a car is 900 kg?
Transcribed Image Text:Q.3: (20 PL.) Consider a system of mass m for which AU = 0, APE = 0, and Q = 0. Physically, this might correspond to a system with constant internal energy, held at constant height, and with no heat exchanges with its surroundings. For this system, the first law gives a balance between changes in kinetic energy and work. In addition, let us assume that a horizontal force F is accelerating the system as it acts through a distance in the x direction. Assume there is no friction force. F- m A. Prove that the work done on a body in accelerating it from an initial velocity (vi) to a final velocity (v) is equal to the change in kinetic energy of bodyt B. Find the Power required (in KW), to accelerate a car from zero to 80 Km/h in 20 seconds on straight- line road? If the mass of a car is 900 kg?
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