MATH 1272 Lecture 1: 6.4- Work
Document Summary
Physics defines work as: the net amount of force require to move an object a given distance. If the force acting to move the object is constant, work=force*distance. Force acting on an object when it"s at a position x is given by f(x) We can do better if we check f(x) more often: Hooke"s law: the force required to hold a spring stretched x units past rest is given by f(x)= kx, where k is a constant that depends on our particular spring. Hooke"s law f(x)= kx, need to find k. 0. 1 m= 10 cm = distance past rest that we are stretched = 15cm- 5cm. We need to pump water out of an inverted conical tank with indicated dimensions. How much work does it take to empty it? (fact: water has a density of 1000 kg/m . Force to lift mass of water against gravity.
