Estimate the magnitude of the magnetic force per unit length between a pair of parallel wires separated by 2 m if they each carry a current of 3 A. (a) 1 _ 10_1 N/m (b) 1 _ 10_3 N/m (c) 1 _ 10_4 N/m (d) 1 _ 10_6 N/m (e) 1 _ 10_8 N/m
Physics1220Chapter8Outline • Twoapproachestostudyingmechanics o TheForceApproach:usesforcesandNewton’sLawsofMotion o TheConservationApproach:basedontheideathatcertainquantities remainunchangedduringaprocessoractivity • Energy o Describesthestateofaparticle,objectorsystem o Notamaterialsubstance o Scalarquantitythatdescribesthestate(motionandconfiguration)of asystem • KineticEnergy(K)describesthemotionofasystem o Oneparticle:! = !!! ! ! o Morethanoneparticle: !!! ! ! ! o TheunitofenergyisJoules:1J=1N*m • PotentialEnergy(U) o Describesasystemthathasn
