A2000-kg elevator rises from rest in the basement to the fourth floor, a distance of 25 m. as it passes the fourth floor, its speed is 4.7 m/s. there is a constant frictional force of 437n. what is the work done by the lifting mechanism?

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance