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WPE Mometntum

Question 1 - A massless spring of spring constant 20 N/m is placed between two carts. Cart 1 has a mass M1 = 5 kg and Cart 2 has a mass M2 = 3.5 kg. The carts are pushed toward one another until the spring is compressed a distance 1.4 m. The carts are then released and the spring pushes them apart. After the carts are free of the spring, what are their speeds?

Solution:1

Question 2 - A ball sits on a spring that has a spring constant of 3500 N/m. the spring is compressed downward by 10 cm and at an angle that is 25° above the horizontal. At this time the ball is in a position that is 7.5 meters above the ground. The spring is released and the ball shootsupward. Find the speed of the ball just prior to hitting the ground. The ball has a mass of 0.125 kg. Ignore air resistance.

Solution:2

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