A student holds two iron magnets, one in each hand. The south pole of one magnet is pointed toward the south pole of the other magnet. As the magnets get closer to each other, they will– A-attract more strongly.
B-attract more weakly.
C-repel more strongly.
D--repel more weakly.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

What are the north and south poles of a solenoid change with?