5. a 2 n and 6 n force pull a 0.5 kg object to
the right, and a 4 n force pulls the object to
the left. what is the net force on the
object?
a. 12 n to the right
b. 8 n to the right
c. 4 n to the right
d. 2 n to the right

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)