Unit 3 Practice Problems

# Unit 3 Practice Problems - Worksheet Chapters 5 and 6 A...

• Test Prep
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A marble of mass m = 15 grams slides down a frictionless ramp of height h = 2.0 m to the bottom of a circular loop of radius r = 0.60 m, as shown at right. 15) What is the speed of the marble when it reaches the bottom of the ramp? 6.26 m/s 16) What normal force does the loop exert on the marble once it reaches the curved section at the bottom of the loop? 1.13 N 17) What is the speed of the marble at the instant it reaches the top of the loop? 3.96 m/s 18) What normal force acts on the marble at the instant it reaches the top of the loop? 0.245 N 19) From what minimum height h could the marble be released and still travel completely around the loop? 1.50 m A 50-kg mass is released from rest and begins to slide from the top of the incline shown at right.
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