ch28-p068 - 68. (a) The largest value of force occurs if...

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Unformatted text preview: 68. (a) The largest value of force occurs if the velocity vector is perpendicular to the field. Using Eq. 28-3, FB,max = |q| vB sin (90°) = ev B = (1.60 × 10– 19 C) (7.20 × 106 m/s) (83.0 × 10– 3 T) = 9.56 × 10– 14 N. (b) The smallest value occurs if they are parallel: FB,min = |q| vB sin (0) = 0. (c) By Newton’s second law, a = FB/me = |q| vB sin θ /me, so the angle θ between v and B is θ = sin −1 F m a I = sin GH q vB JK e LM c9.11 × 10 kghd4.90 × 10 m s i . MN c160 × 10 Chc7.20 × 10 m shc83.0 × 10 −31 −1 −16 14 6 2 −3 OP = 0.267° . Th P Q ...
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