(Solved): A \( 6.0 \)-kg object moving \( 5.0 \mathrm{~m} / \mathrm{s} \) collides with and sticks to a \( 2. ...

A \( 6.0 \)-kg object moving \( 5.0 \mathrm{~m} / \mathrm{s} \) collides with and sticks to a \( 2.0 \mathrm{~kg} \) object. After the collision the composite object is moving \( 2.0 \mathrm{~m} / \mathrm{s} \) in a direction opposite to the initial direction of motion of the \( 6.0 \mathrm{~kg} \) object. Determine the speed of the \( 2.0 \cdot \mathrm{kg} \) object before the collision. a. \( 7 \mathrm{~m} / \mathrm{s} \) b. \( 15 \mathrm{~m} / \mathrm{s} \) c. \( 11 \mathrm{~m} / \mathrm{s} \) d. \( 23 \mathrm{~m} / \mathrm{s} \) e. \( 8 \mathrm{~m} / \mathrm{s} \)