IB Physics 12 Mr. Jean September 25 th, 2014. The plan: Video clip of the day Coulomb’s Law Three charged particles Conical Pendulum Lab Pick up IA Lab.

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Presentation transcript:

IB Physics 12 Mr. Jean September 25 th, 2014

The plan: Video clip of the day Coulomb’s Law Three charged particles Conical Pendulum Lab Pick up IA Lab.

Electric Charge on the Object:

Coulomb’s Law: F Q = Electrostatic force (N) k = Coulomb’s constant (N*m 2 ) / C 2 q 1 = Electric Charge object 1 (C) q 2 = Electric Charge object 2 (C) r 2 = Distance between centres r (m)

Unit Analysis:

Coulomb’s constant:

Coulomb’s Law for 3 particles: What is happening to particle C?

Multiple Charges: All forces are vector quantities and obey the laws of vector addition. Please copy the example people to the left.

Key ideas: Charge A and B both exert a force on C Even knowing A and B effect each other, this has no immediate effect on C. The net force on charge C is the vector sum of the two forces exerted by both charges A and B.

Lost Lightning: