1. A single cylinder horizontal engine runs at 120 r. p.m. The length of stroke is 400 mm. Themass of the revolving parts assumed concentrated at the crank pin is 100 kg and mass of thereciprocating parts is 150 kg. Determine the magnitude of the balancing mass required to beplaced opposite to the crank at a radius of 150mm which is equivalent to all the revolving and 2/3 * r * d of the reciprocating masses. If the crank turns 30° from the inner dead centre, find themagnitude of the unbalanced force due to the balancing mass. ​

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u. s. legal proceeding.)

Bob camina 200 m sur, luego trota 400 m suroeste, luego camina 200 m en una dirección 30? norte del este. a. dibuje una gráfica de los movimientos de bob. use una regla y transportador. b. use método gráfico y analíitico para hallar el desplazamiento total que bob recorrió. (magnitud y dirección) c. compare los resultados obtenidos por el método gráfico y analítico. (por ciento de diferencia).

Time remainin52: 42the chart shows data for a moving object. which conclusion is best supported by the information inthe chart? time (s)velocity (m/s