6_Ch 19 College Physics ProblemCH19 Magnetism

6_Ch 19 College Physics ProblemCH19 Magnetism - 146 CHAPTER...

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146 CHAPTER 19 19.5 Gravitational force: ( ) ( ) 31 2 9.11 10 kg 9.80 m s g Fm g == × ( = 30 8.93 10 N downward × Electric force: ) ( ) 19 1.60 10 C 100 N C e Fq E == − × = ( 17 1.60 10 N upward × Magnetic force: ) ( )( ) () 19 17 17 sin 1.60 10 C 6.00 1 4.80 10 N in direction opposite 4.80 10 N downward m m v B F θ × 6 6 0 m s 50.0 10 T sin right hand rule predicti −− × × 90.0 on ° 19.6 From sin v B = ( , the magnitude of the force is found to be ) ( )( ) 19 1.60 10 C 6 6 17 6.2 10 m s 50.0 10 T sin 90.0 4.96 10 N F × × ° v Using the right-hand-rule (fingers point westward in direction of JG B , so they move downward toward the direction of as you close the hand, the thumb points southward. Thus, the direction of the force exerted on a proton (a positive charge) is
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