Answered: A book box weighing 40 (N) is dragged…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter11: Gravity, Planetary Orbits, And The Hydrogen Atom

Section: Chapter Questions

Problem 31P

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1. A book box weighing 40 (N) is dragged at a speed of 1.5 meters per second on a rough floor. The coefficient of friction is 0.2. What is the heat energy dissipation rate?

2. A cannon fires a shell (20 kg) at an angle. The magnitude of the initial velocity when the cannon is fired is equal to 100. The cannon reaches a height of 180 meters. What is the magnitude of the velocity at peak height?

3. A car accelerates from 40 to 60 km/h in 5 seconds. In a circular path whose radius _ is what is the centripetal acceleration when the speed is equal to 50?

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