A woman takes her dog Rover for a walk on a leash. To get the little dog moving forward, she pulls on the leash with a force of 20 N at an angle 37 ° above the horizontal. (a) How
much force is tending to lift Rover forward? (b) How much force is tending to lift Rover
off the ground?

answer: option c.

explanation:

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.