17_InstSolManual_PDF_Part7

# 17_InstSolManual_PDF_Part7 - 2 1 1.124 3 10 3 N 2 1 1.50 cm...

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Solve: The net force has magnitude and is in the direction. 17.23. Set Up: Like charges repel and unlike charges attract. The charges and the forces on the charges and in the dipole are shown in Figure 17.23. Use the coordinates shown. and Figure 17.23 Solve: The net force has magnitude and is in the direction from the to the charge. (b) and each produce clockwise torques and each have a moment arm of 1.50 cm. and each have zero moment arm and produce no torque. The torque is clockwise. Reflect: The x components of the two forces are in opposite directions so they cancel and the net force has no x component. But the torques of and are in the same direction and therefore produce a net torque. F 2 x F 1 x t 5 2 F 1 x 1 0.0150 m 2 5 2 F 1 cos u 1 0.0150 m 2 5 2 1 1.124 3 10 3 N 21 cos 48.6° 21 0.0150 m 2 5 22.3 N # m F 2 y F 1 y F 2 x F 1 x 2 5.00 m C 1 5.00 m C 1.69 3 10 3 N F y 5 F 1 y 1 F 2 y 5 2 2 F 1 sin u 5 2
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Unformatted text preview: 2 1 1.124 3 10 3 N 2 1 1.50 cm 2.00 cm 2 5 2 1.69 3 10 3 N. F x 5 F 1 x 1 F 2 x 5 0. F 1 5 F 2 5 1 8.99 3 10 9 N # m 2 / C 2 2 1 5.00 3 10 2 6 C 21 10.0 3 10 2 6 C 2 1 0.0200 m 2 2 5 1.124 3 10 3 N. x q 1 q 2 q 3 F 1 F 1 x F 2 x F 2 y F 2 F 1 y y 1.50cm 1.50cm axis 2.00cm u u u 5 48.6°. sin u 5 1.50 cm 2.00 cm q 2 q 1 F 5 k qq r r 2 . 1 x 2.40 3 10 2 7 N F x 5 F 1 x 1 F 2 x 5 1 F 1 2 F 2 5 2.40 3 10 2 7 N. F 2 5 k q 2 q 3 r 2 2 5 1 8.99 3 10 9 N # m 2 / C 2 2 1 5.00 3 10 2 9 C 21 0.600 3 10 2 9 C 2 1 0.300 m 2 2 5 2.997 3 10 2 7 N. F 1 5 k q 1 q 3 r 1 2 5 1 8.99 3 10 9 N # m 2 / C 2 2 1 4.00 3 10 2 9 C 21 0.600 3 10 2 9 C 2 1 0.200 m 2 2 5 5.394 3 10 2 7 N. Electric Charge and Electric Field 17-7...
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