1 .		The following information pertains to questions 1-4. An object of mass mo is initially at rest on a horizontal, frictionless surface. The object is then subjected to a constant force of magnitude Fo which makes an angle o with the horizontal as in the figure at the right. After the object has undergone a horizontal change in displacement Do, it has speed vo and kinetic energy KEo. If the angle which the force makes with the horizontal had been slightly less than o, the speed of the object after the horizontal change in displacement Do would have been ___ vo.
2 .		If the mass of the object had been slightly more than mo, the kinetic energy of the object after the horizontal change in displacement Do would have been ___ KEo.
3 .		If the horizontal change in displacement had been 2 Do, the kinetic energy of the object after this horizontal change in displacement would have been KE = KEo x ___.
4 .		If the same force continued to act on the object until the speed of the object was 2 vo, the total distance through which the force would have acted would be Do x ___.
5 .		The following information pertains to questions 5 and 6. If the work required to get an object with mass mo initially at rest to a speed vo is Wo, . . . . . . the additional work required to increase its speed from vo to 2 vo would be W o x ___.
6 .		. . . the work required to get another object with mass 2 mo also initially at rest to a speed vo would be Wo x ___.
7 .		The following information pertains to questions 7 and 8. Three springs of the same relaxed length Lo have spring constants k1 > k2 > k3. The springs are suspended from the ceiling and identical masses are then hung on each of the springs. In response to these identical stretching forces, the springs stretch amounts x1, x2 and x3, respectively. The elongations of the springs are such that ___.
8 .		The elastic potential energies stored in each of the three springs are such that ___.
9 .		The following information pertains to questions 9 and 10. The work required to stretch a relaxed spring with spring constant ko an amount xo is Wo. The additional work required to stretch the spring from xo to 2 xo would be Wo x ___.
10 .		The work required to stretch the relaxed spring an amount 3 xo would be Wo x ___.
11 .		The following information pertains to questions 11-14. A block with mass mo on a horizontal, frictionless surface is tied to one end of a massless spring with spring constant ko the other end of which is tied to a vertical wall. The block is pulled aside until the spring has been stretched an amount xo, held at rest and released. When the block passes through its equilibrium position, its speed is vo and its kinetic energy is KEo. If the initial stretch of the spring had been 2 xo, the speed of the block as it passes through its equilibrium position would be vo x ___.
12 .		If the spring had been stiffer, i.e., k > ko, the speed of the block as it passed through its equilibrium position would have been ___ vo.
13 .		If the mass of the block had been 4 mo, the speed of the block as it passed through its equilibrium position would have been vo x ___.
14 .		If the initial stretch of the spring had been 2 xo, the kinetic energy of the block as it passed through its equilibrium position would have been KE = KEo x ___.
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