Pilings are driven into the ground at a building site by dropping a 1950 kg object onto them. What change in gravitational potential energy does the object undergo if it is released from rest 16.0 m above the ground and ends up 1.40 m above the ground?
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Pilings are driven into the ground at a building site by dropping a 1950 kg object onto them. What change in gravitational potential energy does the object undergo if it is released from rest 16.0 m above the ground and ends up 1.40 m above the ground?
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- a 16 kg girl slides down a playground slide that is 4.8 m high. when she reaches the bottom of the slide, her speed is 1.9 m/s. the acceleration of gravity is 9.81 m/s^2. how much energy was dissipated by friction? answer in units of J. If the slide is inclined at 40 degrees what is the coefficient of friction between the girl and the slide?A 900 kg roller coaster car starts at point A, then travels 125 ft at 40.0° below the horizontal to point B. (a) Taking point B to be the level where the gravitational potential energy of the car-Earth system is zero, what is the potential energy (in J) of the system when the car is at points A and B, and the change in potential energy (in J) as the coaster moves between these points? 168241.5 X J J X J at point A at point B change in potential energy 0 -168241.5 (b) Repeat part (a), setting the zero configuration with the car at point A. at point A 0 at point B change in potential energy -168241.5 -168241.5 X J X JD. E. ans: E 53. The potential energy of a 0.20-kg particle moving along the axis is given by U(z) = (8.0 J/m²)x² + (2.0J/m*)x . When the particle is at x = 1.0 m the magnitude of its acceleration is: UCI) = 10 W= -lo -lo-ma d A. 0 B. -8m/s C. 8m/s D. -40m/s E. 40 m/s ans: D Chapter 8: POTENTIAL ENERGY AND CONSERVATION OF ENER
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- 1. So imagine a wombat named Horace at rest. It's somehow on the top of a long telephone pole. It has a mass of 44.0 kg. It then slides down the pole reaching a final speed of 5.95 m/s just before reaching the bottom 12.4 later. (a) Calculate the change in the gravitational potential energy of Horace from top to bottom. (b) What is Horace's kinetic energy just before reaching the bottom? (c) What is the average force of friction that acts on Horace while sliding?4. This Olympic skeleton athlete slides down an icy track head first. The track has many twists and turns with a total height of 102.75 m. If the 99.375 kg man has a speed of 27 m/s at the bottom, what was the total work done on him by friction and air resistance slowing him down? (In other words, what was the energy lost to friction and air resistance?) He starts from rest at the top. 6.3843e4 Previous submissions: -63.84 63.84 63843 J J incorrectWhen an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.00×10³ J. By how much does the potential energy of a 18.0 kg child increase when the child climbs a normal staircase to the second floor?
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