2. A boy drops a stone of mass 200 g from a height of 2 m. a) What is the momentum of the stone just before it hits the
floor?
b) What is the impulse of the stone?
c) The stone comes to a halt in 0.05 s. What is the force exerted
on the stone?​

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)