Two identical metal blocks resting on a frictionless horizontal surface are connected by a light metal spring having constant k = 100 N/m and unstretched length Li = 0.400 m as in Figure P15.14a. A charge Q is slowly placed on each block causing the spring to stretch to an equilibrium length L = 0.500 m as in Figure P15.14b. Determine the value of Q, modeling the blocks as charged particles.

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*.. Three spiders are resting on the vertices of a triangular web. The sides of the triangular web have a length of a = 0.54 m, as depicted in the figure. Two of the spiders (S, and S3) have +8.3 pC charge, while the other (S,) has -8.3 uC charge. a/2 a/2 (a) What are the magnitude and direction of the net force on the third spider (S3)? magnitude direction O counterclockwise from the +x-axis (b) Suppose the third spider (S3) moves to the origin. Would the net force on the third spider (S3) be greater than, less than, or equal to the magnitude found in part (a)? O greater than in part (a) O less than in part (a) O equal to the part (a) (c) What are the magnitude and direction of the net force on the third spider (S3) when it is resting at the origin? magnitude direction ° counterclockwise from the +x-axis Additional Materials 2:44 PM W 76°F e Type here to search 9/21/2021 BODA BANG &OUUFSEN insert t sc ho 40 & 81 %24 %23

Three spiders are resting on the vertices of a triangular web. The sides of the triangular web have a length of a = 0.49 m, as depicted in the figure. Two of the spiders (S₁ and S3) have +8.1 µC charge, while the other (S₂) has -8.1 µC charge. a/2 O a/2 (a) What are the magnitude and direction of the net force on the third spider (S3)? magnitude N direction counterclockwise from the +x-axis (b) Suppose the third spider (S3) moves to the origin. Would the net force on the third spider (S3) be greater than, less than, or equal to the magnitude found in part (a)? O greater than in part (a) O less than in part (a) O equal to the part (a) (c) What are the magnitude and direction of the net force on the third spider (S3) when it is resting at the origin? magnitude N direction counterclockwise from the +x-axis