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Physics 15200- HW14

# Physics 15200- HW14 - the block Answer in units oF m s...

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lai (yl8859) – HW14 – Ross – (15200) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 2) 10.0 points Assume: Moving to the right is positive. A(n) 9 . 4 g object moving to the right at 10 cm / s makes an elastic head-on collision with a 21 g object moving in the opposite direction at 46 cm / s. 9 . 4 g 10 cm / s 21 g 46 cm / s ±ind the velocity oF the frst object imme- diately aFter the collision. Answer in units oF cm / s. 002 (part 2 oF 2) 10.0 points ±ind the velocity oF the second object aFter the collision. Answer in units oF cm / s. 003 (part 1 oF 2) 10.0 points A bullet oF mass 9 g moving with an initial speed 200 m / s is fred into and passes through a block oF mass 7 kg, as shown in the fgure. The block, initially at rest on a Frictionless, horizontal surFace, is connected to a spring oF Force constant 936 N / m. 7 kg 200 m / s 9 g 936 N / m v 1 . 2 cm IF the block moves a distance 1 . 2 cm to the right aFter the bullet passed through it, fnd the speed v at which the bullet emerges From
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Unformatted text preview: the block. Answer in units oF m / s. 004 (part 2 oF 2) 10.0 points ±ind the magnitude oF the energy lost in the collision. Answer in units oF J. 005 10.0 points Two ice skaters approach each other at right angles. Skater A has a mass oF 58 . 2 kg and travels in the + x direction at 2 . 25 m / s. Skater B has a mass oF 60 . 7 kg and is moving in the + y direction at 1 . 76 m / s. They collide and cling together. ±ind the fnal speed oF the couple. Answer in units oF m / s. 006 (part 1 oF 2) 10.0 points Three spherical masses are located in a plane at the positions shown in the fgure below. A has mass 29 . 8 kg, B has mass 42 . 9 kg, and C has mass 17 . 6 kg. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 A B C y Distance (m) x Distance (m) Calculate the x-coordinate oF the center oF mass. Answer in units oF m. 007 (part 2 oF 2) 10.0 points Calculate the y-coordinate oF the center oF mass. Answer in units oF m....
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