A student dressed in a suit of iron armor has a total mass of 210 kg. An electromagnet has just enough force to hold him suspended in the air. What is the force applied by the electromagnet?

1 Answer
David G.
May 11, 2017

The student is not accelerating, so the forces must be balanced (net force = #0# #N#).

The downward weight force is #F = mg = 210 xx 9.8 = 2058# #N#. The upward force provided by the electromagnet must be of the same size in the opposite direction.

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