The following information pertains to Questions 1–4.
o 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 .
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 .
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 ___.
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 ___.
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 Wo x ___.
. . . the work required to get another object with mass 2 mo also initially at rest to a speed vo would be Wo x ___.
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 ___.
1 > x2 > x3 1 < x2 < x3 1 = x2 = x3
The elastic potential energies stored in each of the three springs are such that ___.
1 < EPE2 < EPE3 1 = EPE2 = EPE3 1 > EPE2 > EPE3
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 ."
o to 2 xo would be Wo x ___.
The work required to stretch the relaxed spring an amount 3 xo would be Wo x ___.
