Center of Mass: Three small masses are positioned at the following coordinates: 3.0 kg at (3.0 m, 2.0 m); 4.0 kg at (0.0 m, -1.0 m); and 5.0 kg at (5.0 m, -7.0 m). What are the coordinates of the center of mass (or center of gravity) of this system?

Fill in the blank(s) with the appropriate word(s).


(2.8 m, -2.8 m)

Physics & Space Science

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(a) Ram injection molding (b) Blow molding (c) Thermoforming (d) Compression molding

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Two masses are being pulled up a frictionless 30.0 degrees incline by a force F parallel to the incline. The acceleration up the incline is 1.00 The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass. The force F is

A. 875 N. B. 980 N. C. 1,140 N. D. 1,720 N. E. 2,070 N.

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Constellations are ________.

A. fixed patterns of stars on the celestial sphere B. stars representing the path of the Sun through the sky C. groups of stars that are close to each other in space D. animals that look like groupings of stars E. stars that neither rise nor set

Physics & Space Science

A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. Since a lot of damage is done on the car

A) the force on the truck is greater then the force on the car. B) the force on the truck is equal to the force on the car. C) the force on the truck is smaller than the force on the car. D) the truck did not slow down during the collision. E) the car did not slow down during the collision.

Physics & Space Science