Power Engineering 4A - Unit 1 - Elementary Mechanics and Dynamics Latest Update Graded A+

Power Engineering 4A - Unit 1 - Elementary Mechanics and Dynamics Latest Update Graded A+ What is the power required to apply a 200kN force over a distance of 15m in 15 seconds? Select one: a. 3000 W b. 1500 kW c. 1000 kW d. 200 kW D A 7m long bar is pivoted at 2m from the left end. A force of 60N is applied downwards on the left end and a force of 20N is applied downward on the right end. What would be the clockwise and counter-clockwise moments about the pivot, due to each force, and in which direction would the bar rotate? Select one: a. 120Nm counter-clockwise, 100Nm clockwise, clockwise rotation. b. 120Nm counter-clockwise, 100Nm clockwise, counter-clockwise rotation. c. 80Nm counter-clockwise, 100Nm clockwise, counter-clockwise rotation. d. 60Nm counter-clockwise, 100Nm clockwise, clockwise rotation. B A titanium bar with a mass of 2kg and a length of 3m shortens by 0.02mm under a compressive load of 3900kN. What is the strain? Select one: a. 6.66 x 10-3 b. -1.9 x 102 c. 0. d. 1.9 x 10-3 C External tensile forces acting parallel but not in line produce _________ in an object. Select one: a. Shear stress b. Working stress c. Compressive stress d. Tensile stress A The ratio between the ultimate strength and the allowable stress is called the: Select one: a. Working stress b. Safety factor c. Maximum allowable load d. Ultimate stress B The ability of a material to return to its