You want to move your m = 29 kg spare tire from the floor onto the back of your pickup truck. the bed of your truck is h = 0.83 m above the floor. you have found a sturdy rope, and a strong plank to use as a ramp that is d = 2.6 m long. the coefficient of kinetic friction between the tire and the plank is μ.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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 image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.