Two rocks are tied together with a string of negligible mass and thrown into the air. At a particular instant, rock 1, which has a mass of 0.1 kg, is headed straight up with a speed of 5 m/s, and rock...

Two rocks are tied together with a string of negligible mass and thrown into the air. At a particular instant, rock 1, which has a mass of 0.1 kg, is headed straight up with a speed of 5 m/s, and rock 2, which has a mass of 0.25 kg, is moving parallel to the ground, in the direction, with a speed of 7.5 m/s. What is the total momentum of the system consisting of both rocks and the string?

Section 3.13