The mass of the coaster car shown below is 250 kg. point 1 is 100.0 m above the ground. point 3 is 55 m above the ground. the speed at point 3 is 27.0 m/s. calculate the total mechanical energy of the system.

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?