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physicsassignment5

# physicsassignment5 - Post 1/4 Hi I am having trouble doing...

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Post 1/4 Hi, I am having trouble doing these problems listed below. Please show me how to solve these problems for future reference. Thank you very much. I would like for you to show me all of your work/calculations and the correct answer to each problem. 15. A 5.0-kg block at rest on a frictionless surface is acted on by forces F 1 = 5.5 N and F 2 = 3.5 N. What additional horizontal force will keep the block at rest? Answer: F 3 = (-7.6 N) ^ x 19. The engines of most rockets produce a constant thrust (forward force). However, when a rocket is fired into space, its acceleration increase with time as the engine continues to operate. Is this situation a violation of Newton’s second law? Explain. 23. What is the mass of an object that accelerates at 3.0 m/s 2 under the influence of a 5.0- N net force? Answer: 1.7 kg 29. What is the weight of an 8.0-kg mass in newtons? How about in pounds? Answers: 78 N, 18 lb (Please show your calculations) 33. A horizontal force of 12 N acts on an object that rests on a level, frictionless surface on the Earth, where the object has a weight of 98 N. (a) What is the magnitude of the

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