If the mass of the block is too large and the block is too close to the left end of the bar (near string B) then the horizontal bar may become unstable (i. e., the bar may no longer remain horizontal). What is the smallest possible value of xxx such that the bar remains stable (call it xcriticalxcriticalx_critical)

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?