A 0.5-kg ball is moving in a circular path at the end of a string with a constant speed of 3 m/s. The length of the string is 1 m. What is the magnitude of the centripetal force exerted by the string on the ball to produce this motion?

12. Rock Cycle Fill in the numbered and lettered blanks in the rock cycle shown below.  The numbered blanks will be filled in with the names of the 3 main rock types (one is subdivided into a and b) and one other material that is not yet a rock.  The letters on the arrows refer to the name of the process forming these rocks/materials. Lastly, there are some arrows not yet drawn.  Normally I’d have you draw these in and label them, but since you can’t do that on an online drawing, I want you to describe where the needed arrows would go from and to, and what process you would label them with. Hint 1: Numbers 1a and 2 are formed at the Earth’s surface, 3 is formed fairly close to the surface, and 1b and 4 are usually formed deep within the earth. Hint 2: For A and B, there are 2 arrows, but consider them as one set of processes.  For A, B, C, D,and E, there are a number of possible correct answers, and more than one will be accepted. Spelling counts.  If you mis-spell an answer, you will not receive full credit. Figure 14 1a:                                 A: 1b:                                B: 2:                                      C: 3:                                      D: 4:                                      E: What arrows are missing from this drawing, and what process happens in each of them? I will go over these to make sure that you get as much credit as possible.

For each question below select the single best answer. Questions worth 2 points require no particular calculations, just a conceptual understanding. Questions worth 5 points require some amount of calculation to attain an answer. Use your scratch paper and calculator. Put your name, date, and exam number at the top of your scratch paper Work out your calculations using your scratch paper and calculator Please make note of the question number next to your scratch work and circle your answer.   After completing your exam, you can take a picture or scan your scratch work and submit. Your scratch work will be graded for completeness and correctness, and I will award up to 10 bonus points on your exam grade. Use the EQUATION SHEET below as a reference:    

A block of mass 15 kg accelerates from rest to a speed of 10 m/s in 5.0 s. What is the magnitude of the net force acting on the block?

A pendulum is swinging back and forth and has a kinetic energy of 400 J at a particular point in its path. Which of the following statements is not true?

A cyclist races around a circular track at the constant speed of 20 m/s. The radius of the track is 40 m. The centripetal acceleration of the cyclist is

A crate is pulled a distance of 15 meters by a horizontal rope with a force of 240 N while a sliding friction force of 60 N opposes that motion. What is the total work done on the crate over this distance?

When an object is moving in a circle at constant speed, its acceleration is

When objects are moved further apart from each other, the force of gravity

For reasons known only to them, a group of extraterrestrials offers you your choice of three gold ingots.  One weighs 10 N on Earth, the second weighs 10 N on Jupiter, and the third weighs 10 N on the Moon.  To get the most gold, you should choose the ingot that weighs 10 N on