A box of mass m sliding with an initial speed of vi on a rough horizontal surface runs into a fixed spring of elastic constant k, compressing it a distance x1 from its relaxed position while momentarily coming to rest. Write down the equation that best represents the energy conversion during the process of the box compressing the spring?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around