The principle of conservation of energy is represented by

12:45 1 4) A roller coaster of mass 80.0 kg is moving with a speed of 20.0 m/s at position A as shown in the figure. The vertical height above ground level at position A is 200 m. Neglect friction. 200 m 160 m -- Potential Energy 0 A.What is the total mechanical energy of the roller coaster at point A? B. What is the total mechanical energy of the roller coaster at point B? C. What is the speed of the roller coaster at point B? Explain your D. What is the speed of the roller coaster at point C? answer

Do #9 from the Energy WS 4 which is posted on Canvas. Make sure you define your system, draw your bar graphs, and write the conservation of energy equation. Finally solve symbolically and plug in for an answer.

A crane at a construction site lifts a concrete block with a mass of m = 482 kg from the ground to the top of a building with a height of h = 23.9 m. How much work did the motor of the crane do? (Assume zero energy loss in the lifting mechanism due to friction.) -112894 J moter If the duration of the lift was 1.35 minutes, then what was the average power performed by the crane?

A woman swimming upstream is not moving with respect to the shore. Is she doing any work? If she stops swimming and merely floats, is work done on her? Explain comprehensively.

We know from the reading that it is possible to move the same object two different distances and still do the same amount of work. Let's consider an example in which Jane pushes a block of ice up an incline while Kip lift the same block of ice vertically to the top of the same incline. See the figure below. (look at picture) We will assume that there is no friction between the surface of the incline and the block of ice. Both of these situations will require the same amount of work and that the result of lifting the ice block to some height imparts potential energy to the ice. In this activity, we will make various calculation to help us better understand the relationship between work and potential energy and the idea of conservation of energy. For this activity we will assume that the mass of the ice block is 5.6 kg and the vertical height of the incline is 2 m. This is the vertical distance that Kip must lift the block of ice. We will assume that the acceleration due to gravity is 10…

Please help me this question! I already know that the answer is option E but I don't know how to get that answer. Please include full work for this question!

roblem 8.71 11 of 11 A ski area claims that its lifts can move 51000 people per hour. Constants Periodic Tabl Part A If the average lift carries people about 290 m (vertically) higher, estimate the maximum total power needed (Assume the mass of the average person to be 70 kg) Express your answer to two significant figures and include the appropriate units. P= Value Units Submit Request Answer < Return to Assignment Provide Feedback P Type here to search 807 AM (?) ヘ 梦 10/7/2020 kspac

Is it experimentally possible that the energy absorbed by the cylinder due to friction could be greater than the work performed on it? Explain.

A 68.2-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.64 m, and ends with a speed of 8.51 m/s. How much nonconservative work (in kJ) was done on the boy? kJ