Is it correct to take the total magnetic force to act at the center of gravity of the rod when calculating the torque?

How to tell if a molecule is polar or nonpolar with electronegativity

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

Acar of mass 800kg is moving at a speed of 2.2m/s.