P# Chapter 8 Problem Worksheet The following questions are either TRUE or FALSE.

Question

P# Chapter 8 Problem Worksheet The following questions are either TRUE or FALSE. Write which you think it is. 1) The sum of the kinetic and potential energies of an object is conserved only when the object is under the influence of conservative forces. MULTIPLE CHOICE. Choose the one alternative tha t best completes the statement or answers the question. A mass is attached to one end of a string. The other end of the string is attached to a rigid support. The mass is released at A and swings in a arc to points B, C, and D. 2) Refer to the figure above. At what point does the mass have the most potential energy? A) A ?) ? c) C D) D E) none of the given points 3) Refer to the figure above. At what point does the mass have the most kinetic energy? A) A ?) ? C) C D?Dne of the g. Ei none of the given points

Explanation / Answer

1) The principle of the conservation of mechanical energy states that the total mechanical energy in a system ( the sum of the potential plus kinetic energies) remains constant as long as the only forces acting are conservative forces.

So, the given statement is true.

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