Physics hw 8

# Physics hw 8 - mata(jpm2873 – HW#8 – Antoniewicz...

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Unformatted text preview: mata (jpm2873) – HW #8 – Antoniewicz – (57420) 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Three particles are placed in the xy plane. A m 1 = 71 g particle is located at ( x 1 , y 1 ), where x 1 = 4 m and y 1 = 5 . 6 m and a m 2 = 71 g particle is located at ( x 2 , y 2 ), where x 2 =- 2 m and y 2 =- 3 . 8 m. What must be the x coordinate of the m 3 = 15 g particle so that the center of mass of the three-particle system is at the origin? Answer in units of m. 002 (part 1 of 2) 5.0 points A square plate is produced by welding to- gether four smaller square plates, each of side a . The weight of each of the four plates is shown in the figure. x y 20 N 10 N 80 N 30 N (0 , 0) (2 a, 0) (0 , 2 a ) (2 a, 2 a ) Find the x-coordinate of the center of grav- ity (as a multiple of a ). Answer in units of a . 003 (part 2 of 2) 5.0 points Find the y-coordinate of the center of gravity (as a multiple of a ). Answer in units of a . 004 (part 1 of 2) 5.0 points A(n) 3 . 8 kg object moving with a speed of 6 . 8 m / s collides with a(n) 3 . 6 kg object mov- ing with a velocity of 10 . 4 m / s in a direction 61 . 7788 ◦ from the initial direction of motion of the 3 . 8 kg object.8 kg object....
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Physics hw 8 - mata(jpm2873 – HW#8 – Antoniewicz...

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