The ground reaction force acting on carter during his long jump is 4500 n acting forward and upward at an angle of 78 degrees from horizontal. carters mass is 70 kg. other than gravity, this is the only external force acting on carter. a. what is the vertical component of this ground reaction force? b. what is the horizontal component of this ground reaction force? c. how big is the net force, the sum of all the external forces, acting on carter?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)