PHC5Quizzes

# PHC5Quizzes - 2004 Quiz Physics Honors Chapter 5 Quiz 1 I s...

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2004 Quiz Physics Honors Chapter 5 Quiz 1. Is it possible for a system to have negative potential energy? A. Yes, as long as the total energy is positive. B.* Yes, since the choice of the zero of potential energy is arbitrary. C. No, because the kinetic energy of a system must equal its potential energy. D. No, because this would have no physical meaning. E. Not covered in the assigned reading. 2. Can work be done on a system if there is no motion? A. Yes, if an outside force is provided. B. Yes, since motion is only relative. C. No, since a system that is not moving has no energy. D.* No, because of the way work is defined. E. Not covered in the assigned reading. 3. Consider two masses m 1 and m 2 at the top of two frictionless inclined planes. Both masses start from rest at the same height. However, the plane on which m 1 sits is at an angle of 30 degrees to the horizontal, while the plane on which m 2 sits is at 60 degrees. If the masses are released, which is going faster at the bottom of its plane? A. m 1 B. m 2 C.* They are going the same speed. D. Cannot be determined. E. Not covered in the assigned reading. 4. A ball drops some distance and gains 30 J of kinetic energy. Do not ignore air resistance. How much gravitational potential energy did the ball lose? A.* More than 30 J B. Less than 30 J C. Exactly 30 J D. Cannot be determined. E. Not covered in the assigned reading. 5. If you push twice as hard against a stationary brick wall, the amount of work you do on the wall A. doubles B. is cut in half C. remains constant but non-zero D.* remains constant at zero. E. Not covered in the assigned reading. 6. A child pushes horizontally on a box of mass m that moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is . At what rate does the child do work on the box? A.* B. C. D. E. 7. Two objects collide and stick together. Kinetic energy A. is definitely conserved. B. is conserved only when momentum is conserved. C. is conserved only if the collision is elastic. D. is conserved only if the environment is frictionless. E.* Not covered in the assigned reading. 8. Which of the following energy forms is associated with an object due to its position relative to Earth? A. potential energy B.* gravitational potential energy C. elastic potential energy

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D. kinetic energy E. Not covered in the assigned reading. 9. Which of the following energy forms is stored in any compressed or stretched object? A. potential energy B. gravitational potential energy C.* elastic potential energy D. kinetic energy E. Not covered in the assigned reading. 10. An object is moving in a circular path at constant speed. Does the force acting on the object do work on the object? A.
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PHC5Quizzes - 2004 Quiz Physics Honors Chapter 5 Quiz 1 I s...

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