Electrical energy is transformed into mechanical energy in a motor when the electromagnet consistently turns in the same direction. What part of the
motor causes this motion?
A. The commutator
B. The battery
C. The loop of wire
D. The permanent magnets

=force × distance a. work b. velocity c. pressure d. momentum

The total amount of energy contained in an object

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)