One difference between moving charges and stationary charges is that
A) moving charges exert both electric and magnetic forces, while stationary charges exert neither electric nor magnetic forces.
B) moving charges exert only magnetic forces, while stationary charges exert both electric and magnetic forces.
C) moving charges exert both electric and magnetic forces, while stationary charges exert only electric forces.
D) moving charges exert only magnetic forces, while stationary charges exert only electric forces.
E) moving charges stay slender, while stationary charges are couch potatoes.
C
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In the figure, a block of mass m is moving along the horizontal frictionless surface with a speed of 5.70 m/s
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