An aluminum rod with a mass of 0.220 kg slides on parallel horizontal steel rails, 0.440 m apart, and carries a current of 15.0 A. The coefficient of friction between the rod and rails is 0.470. What vertical, uniform magnetic field is needed to keep the rod moving at a constant speed

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

Acorporation gives out its profits as dividends paid to whom?

7types of electromagnetic waves from lowest to highest frequency