]the rear door of a minivan is hinged at point a and is supported by two struts; one strut is between points b and c, and the second strut is immediately behind this on the opposite side of the door. if the door weighs 350 n with center of gravity at point d and it is desired that a 40 n vertical force applied by a person’s hand at point e will begin closing the door, determine the force that each of the two struts must support and the reactions at the hinge

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1