Compare the mechanical energy of this roller coaster at the top to the mechanical energy at the bottom of the hill.
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- A ball is thrown upward in the air. Neglect air resistance. As it travels upward, a) Both its kinetic energy and potential energy increase. b) Its kinetic energy increases and potential energy decreases. c) Its kinetic energy decreases and potential energy increases. d) Both its kinetic energy and potential energy decreases.What can you do to increase the power you develop as you climb a flight of stairs?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…
- When a roller coaster is at the top of a steep hill, its potential energy is maximum. When it hurdles down the slope and comes to the bottom, the potential energy reduces greatly. Hence we can say that the law of conservation of energy is not valid here since energy is destroyed. a) True b) FalseAtruck with a mass m = 1820 kg is moving with a speed of 24.3 m/s in the southward direction. Calculate kinetic energy of truck in joules.A roller coaster car has a massive 320 kg. Starting from the rest the car requires 3.5×10^5 joules of kinetic energy As it designs to the bottom of the hill in 4.5 seconds calculate in meters the height of the hill