1. A mass is hanging on the end of a spring and oscillating up and down. There a
ID: 1915557 • Letter: 1
Question
1. A mass is hanging on the end of a spring and oscillating up and down. There are three forces acting on the mass, the force of the spring, the force of gravity and the force of air resistance. Which of these forces can be associated with potential energy function? a. The spring force only. b. Gravity only. c. Air resistance only. d. The spring force and gravity. e. The spring force and air resistance. f. Gravity and air resistance. g. All three forces. 2. An object starting with a certain speed slides with friction on a horizontal surface until it comes to rest. Doing which of the following would double the distance it travels before coming to rest? a. Doubling the mass of the object. b. Doubling the velocity of the object. c. Doubling the coefficient of friction between the object and the surface. d. None of the above actions would double the distance it travels. 3. An object of mass m travels halfway around a circle at a constant speed v. The magnitude of the total work done on the object by the net force acting on it (not counting starting and stopping at the beginning and end of the path) is a. equal to mv. b. equal to 2mv. c. equal to 1?2 mv2. d. equal to mv2. e. equal to zero A force is ________________ if the work it does on a object depends only on the initial and final positions of the object and not on the path selected to move between those points. a. Potential b. Mechanical c. Conservative d. Nonconservative e. Dissipative 5. Under ordinary road conditions, the shortest distance in which an automobile can be stopped by the application of a constant braking force is directly proportional to a. the time required for stopping. b. the momentum of the automobile. c. the speed of the automobile. d. the square of the speed of the automobile. e. the square root of the speed of the automobile. d. Nonconservative e. Dissipative d. equal to mv2. e. equal to zero.Explanation / Answer
Please rate the best answer first !!! Rate all other answers after that !!1
1.) d. The spring force and gravity.
2) b. Doubling the velocity of the object.
3) d. equal to mv2.
4) conservative
5) the square of the speed of the automobil
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