【单选题】The diagram below depicts a hockey puck moving across a horizontal, frictionless surface in the direction of the dashed arrow. A constant force F, shown in the diagram, is acting on the puck. For the ...
【简答题】There are two characteristics of single-acting vane pump , one is that the displacement can be altered by changing , and the other is that the oil delivery direction can be altered by changing the ecc...
【简答题】The force on an area of 0.2 is due to a pressure of 120 kPa. Calculate the magnitude of the force acting on the area. Assume the force acts on the suce in the normal direction.