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Chris spent \$10.50 for each compact disk and \$8 for each tape. He purchased three more tapes than compact disks, and the total amount of money he spent was less than \$120. Let x represent the number of compact disks he purchased, and write an algebraic expression for each item in parts a through c. a) The total cost, in dollars, of the compact disks. (1 point) b) The number of tapes. (1 point) c) The total cost, in dollars, of the tapes. (1 point) d) The sum of the costs in parts a and c is less than \$120. Write and solve an inequality to determine the possibilities for the number of compact disks purchased. Write final answer in sentence form. (5 points

## Chris spent \$10.50 for each compact disk and \$8 for each tape. He purchased three more tapes than compact disks, and the total amount of money he spent was less than \$120. Let x represent the number of compact disks he purchased, and write an algebraic expression for each item in parts a through c. a) The total cost, in dollars, of the compact disks. (1 point) b) The number of tapes. (1 point) c) The total cost, in dollars, of the tapes. (1 point) d) The sum of the costs in parts a and c is less than \$120. Write and solve an inequality to determine the possibilities for the number of compact disks purchased. Write final answer in sentence form. (5 points

MAE 2600 (FS2015) Homework #15 (Section 15B-1) Name:_________________________ Due: Wednesday, 10/7/15 ID#: ( ) H15-1. The 1.5-kg ball A is thrown so that it travels horizontally at an unknown speed when it strikes the 8-kg block B as it is travelling down the inclined plane at 3 m/s. If the block B slides 1.2 m up the plane (before it momentarily stops) after the impact, determine the speed of the ball A just before and just after the impact. The coefficient of kinetic friction between the block and the plane is k = 0.24 and the coefficient of restitution between the ball and the block is e = 0.75. H15-2. Two smooth disks A and B each have a weight of 2-lb. If both disks are moving with the velocities shown when they collide and the disk B travels along a line,  = 40 clockwise from the x axis as shown after collision, determine the velocities of the disk A just before and just after collision. The coefficient of restitution is e = 0.7.

## MAE 2600 (FS2015) Homework #15 (Section 15B-1) Name:_________________________ Due: Wednesday, 10/7/15 ID#: ( ) H15-1. The 1.5-kg ball A is thrown so that it travels horizontally at an unknown speed when it strikes the 8-kg block B as it is travelling down the inclined plane at 3 m/s. If the block B slides 1.2 m up the plane (before it momentarily stops) after the impact, determine the speed of the ball A just before and just after the impact. The coefficient of kinetic friction between the block and the plane is k = 0.24 and the coefficient of restitution between the ball and the block is e = 0.75. H15-2. Two smooth disks A and B each have a weight of 2-lb. If both disks are moving with the velocities shown when they collide and the disk B travels along a line,  = 40 clockwise from the x axis as shown after collision, determine the velocities of the disk A just before and just after collision. The coefficient of restitution is e = 0.7.

the disk is rotating at a constant rate w=4 rad/s , and as it falls freely , its center has an acceleration of 32.2 rad s. Determine the acceleration of point B on the rim of the disk at the instant shown .