To calculate we use the formula for a magnetic force in a current-carrying wire expressed as the product of the current, magnetic field and the length of the wire. F = I x L x B
where F is the force on the wire, I is the current flowing on the wire, L is the length of the wire and B is the magnetic field.
To determine the force that acts on the mass, just multiply the mass by the gravitational field. Using the given data, F = (2.50 kg)(14 N/kg) = 35 N Therefore, the force that acts on the mass is equal to 35 N.