8. Centripetal Forces & Gravitation
Gravitational Potential Energy
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- Multiple ChoiceA car is driving up a hill. What is the change in potential energy of the car when it undergoes a displacement of .414views
- Textbook Question
(I) By how much does the gravitational potential energy of a 58-kg pole vaulter change if her center of mass rises 4.0 m during the jump?
239views - Textbook Question
(II) A sphere of radius r₁ has a concentric spherical cavity of radius r₂ (Fig. 8–42). Assume this spherical shell of thickness r₁ - r₂ is uniform and has a total mass M. Show that the gravitational potential energy of a mass m at a distance r from the center of the shell ( r > r₁ ) is given by
U = - (GmM/r).
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249views - Textbook QuestionThe free-fall acceleration on a large asteroid, in the vacuum of space, is 0.15 m/s^2. A spacecraft hovering 500 m above the surface drops a 25 kg payload wrapped in a padded jacket. What is the payload's impact speed?797views
- Textbook Question
(II) A 66.5-kg hiker starts at an elevation of 1150 m and climbs to the top of a peak 2660 m high.
(a) What is the hiker’s change in potential energy?
228views - Multiple ChoiceWhen is gravitational potential energy transformed into kinetic energy?63views
- Multiple ChoiceWhat happens to the gravitational potential energy of an object as it moves up a pyramid?38views
- Multiple ChoiceWhich object has the most gravitational potential energy?47views