Detailed process of solving magnetic field problem in high school mathematics and physics - Training Enrollment Network

Detailed process of solving magnetic field problem in high school mathematics and physics

The force analysis of (1) shows that the ball is positively charged.

? F electricity =qE=mg/tanθ

E=mg/(q*tanθ)

(2)F =mg/sinθ

? a=g/sinθ

? 2ax=v02

x=v02*sinθ/2g

(3) horizontal displacement L=xcosθ

? W=qEL= 1/2*(mv02cos2θ)

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