Solved Questions on the Velocity and Kinetic Energy - Final Exam | PHYS 111, Exams of Physics

Download Solved Questions on the Velocity and Kinetic Energy - Final Exam | PHYS 111 and more Exams Physics in PDF only on Docsity! 17 September 2008 Phys 111 Fall 2008 Question 1 A person pushes a box in contact with the floor. Which of the following is true? 1. The box moves forward because the person pulls forward slightly harder on the box than the box pulls backward on the person. 2. Because action always equals reaction, the person cannot pull the box since the box pulls backward just as hard as the person pulls forward, so there is no motion. 3. The person gets the box to move by giving it a tug during which the force on the box is momentarily greater than the force exerted by the box on the person. 4. The persons force on the box is as strong as the force of the box on the person, but the frictional force on the person is forward and large while the backward frictional force on the box is small. 5. The person can pull the box forward only if he or she weighs more than the box. – Typeset by FoilTEX – 1 17 September 2008 Phys 111 Fall 2008 Question 2 A ball is dropped from rest and falls freely under the influence of gravity. 1 2 3 4 5 6 7 8 y Initial Final 1. The velocity decreases and the kinetic energy increases. 2. The velocity increases and the kinetic energy increases. 3. The velocity decreases and the kinetic energy decreases. 4. The velocity increases and the kinetic energy decreases. 5. The velocity increases and the kinetic energy remains constant. – Typeset by FoilTEX – 2