Answer: The force is directed upward
Explanation: Considering the Lorentz force, given by:
F= qv×B
using the right hand rule and considering the direction of electron velocity and the magnetic field from the figure, the vectorial product gives a force vector upwards .
If the magnitude of the resultant of two vectors doesn't equal the sum
of their individual magnitudes, then they can have ANY directions, EXCEPT
only that they can't both be in the SAME direction.
When the elastic potential energy in the ruler was released it gave energy to the coin thus launching into the air. The coin got its kinetic energy from the ruler
