A 4.00 kg ball is moving at 3.00 m/s to the NORTH and a 5.00 kg ball is moving at 2.00 m/s to the NORTHWEST. The total momentum of the system is
A. 20.3 kg m/s at an angle of 89.7 degrees NORTH of EAST.
B. 20.3 kg m/s at an angle of 24.6 degrees SOUTH of EAST.
C. 26.1 kg m/s at an angle of 24.6 degrees NORTH of EAST.
D. 26.1 kg m/s at an angle of 89.7 degrees SOUTH of EAST.
E. 43.00 kg m/s at an angle of 45.0 degrees NORTH of EAST.
A. 20.3 kg m/s at an angle of 89.7 degrees NORTH of EAST.
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Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (?2, ?2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
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Two infinite parallel surfaces carry uniform charge densities of 0.20 nC/m2 and ?0.60 nC/m2. What is the magnitude of the electric field at a point between the two surfaces?
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