SUBJECT: PHYSICS 1. A lawn-mower is pushed with a force of 50N. If the angle between the handle of the mover and the ground is 30° i. Calculate the magnitude of the force that is pressing the lawn-mower directly into the ground.
ii. Calculate the magnitude of the effective force that moves the mower forward
iii. Why does the lawn-mower move forward and not downward into the ground?​

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)