11. The gravitational potential energy of a 3.4 g grasshopper 14 mm above the ground is a) 4.7 x 10-4 J b) 4.7 J c) 0.47 J d) 4.7 x 10² J e) 4.7 x 10-2 J 12. To maximize the gravitational potential energy of an object, you should: a) Raise it as quickly as possible d) Avoid acceleration during lifting b) Get it as high as possible e) Lower it in the vertical direction c) Maximize the total distance travelled 13. Force F₁ acts on an object and does work W₁. At the same time, force F₂ acts on the object and does work W₂. If the speed of the object does not change, which of the following must be true? a) W₁ is zero and W₂ is positive b) W₁ = -W₂ c) W₁ is positive and W₂ is zero d) W₁ is positive and W₂ is positive

11. The gravitational potential energy of a 3.4 g grasshopper 14 mm above the ground is a) 4.7 x 10-4 J b) 4.7 J c) 0.47 J d) 4.7 x 10² J e) 4.7 x 10-2 J 12. To maximize the gravitational potential energy of an object, you should: a) Raise it as quickly as possible d) Avoid acceleration during lifting b) Get it as high as possible e) Lower it in the vertical direction c) Maximize the total distance travelled 13. Force F₁ acts on an object and does work W₁. At the same time, force F₂ acts on the object and does work W₂. If the speed of the object does not change, which of the following must be true? a) W₁ is zero and W₂ is positive b) W₁ = -W₂ c) W₁ is positive and W₂ is zero d) W₁ is positive and W₂ is positive

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 8.1CQ: One person drops a ball from the top of a building while another person at the bottom observes its...

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