5. An electron strikes the screen of a cathode-ray tube with a velocity of 10 m/s. Compute its kinetic energy in joules. The mass of an electron is 9.11 x 10-³¹ kg. 6. A body of mass 2 kg. is initially at rest on a horizontal frictionless plane. It is the pulled 4 meters by a horizontal force of magnitude 25 N. Use the work-energy relation to find its final speed. 7. In problem 6, suppose the body has an initial velocity of 10m/s and is then pulled 4 meters by a force of magnitude 25 N in the direction of the initial velocity, what is its final velocity?

5. An electron strikes the screen of a cathode-ray tube with a velocity of 10 m/s. Compute its kinetic energy in joules. The mass of an electron is 9.11 x 10-³¹ kg. 6. A body of mass 2 kg. is initially at rest on a horizontal frictionless plane. It is the pulled 4 meters by a horizontal force of magnitude 25 N. Use the work-energy relation to find its final speed. 7. In problem 6, suppose the body has an initial velocity of 10m/s and is then pulled 4 meters by a force of magnitude 25 N in the direction of the initial velocity, what is its final velocity?

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Description: 5. An electron strikes the screen of a cathode-ray tube with a velocity of 10 m/s.Compute its kinetic energy in joules. The mass of an electron is 9.11 x 10 -³¹ kg.6. A body of mass 2 kg. is initially at rest on a horizontal frictionless plane. It i

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 64PE: Integrated Concepts (a) What force must be supplied by an elevator cable to produce an acceleration...

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