As an object slides across a rough horizontal surface, what happens to the object's gravitational potential energy with respect to the surface and speed? (1) Both gravitational potential energy and speed decrease. (2) Gravitational potential energy decreases and speed remains the same. (3) Gravitational potential energy remains the same and speed decreases.
(4) Both gravitational potential energy and speed remain the same.​

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

What organization and environment is described above?

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)