Homework4_solutions

# Homework4_solutions - Homework 4 Solutions Chapter 4 Review...

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Homework 4 Solutions Chapter 4 Review Questions 1. Q4: No, pushing if applied horizontally is at 90 degrees to the normal force, which determines the magnitude of the force of friction. 2. Q8: same 3. Q16: Weight = (1.0kg)(10.0ms 2 ) = 10N 4. Q29: F = GMm/r 2 = ma; a = GM/r 2 , where m is the mass of the falling object. 5. Q31: (10 - 4)N = 6N; (10 - 10)N = 0N 6. Q32: The speed and horizontal area 7. Q34: The force required to stop the larger person is greater Plug and Chug 8. Q2: Weight = (2000kg)(10.0m/s 2 ) = 20,000N 9. Q4: Mass = 1.0N ÷ 10.0m/s 2 = 0.1kg; (0.1kg)(2.2lb/kg) = 0.22lb 10. Q6: 500N ÷ 2000kg = 0.250m/s 2 11. Q8: 20N ÷ 2.0kg = 10m/s 2 ; (20N 4N) ÷ 2.0kg =8.0m/s 2 12. Q10: F = (1.2kg)(1.8) = 2.16N Ranking 13. Q2: CBA 14. Q4: CAB, BAC Exercises 15. Q8: His weight = (400kg)( 10m/s 2 ) = 4000N 16. Q20: An object will not accelerate if the net force is zero 17. Q28: a) No, air resistance is a force b) Yes, gravitational force alone is changing the cross radial vector velocity direction to produce centripetal acceleration. 18.

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## This note was uploaded on 12/04/2011 for the course PHYSICS 1025 taught by Professor Ramos during the Summer '11 term at Miami Dade College, Miami.

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Homework4_solutions - Homework 4 Solutions Chapter 4 Review...

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