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lecture_21 - Room Frequency BA Clicker Ques.on A bucket...

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3/3/2014’ PHYS-2010’ 1’ N R B T A’bucket’containing’a’brick’is’swung’in’a’ circle’at’ constant ’speed’in’a’[email protected] plane’as’shown.’The’bucket’is’swung’fast’ enough’that’the’brick’does’not’fall’out.’ The net ’force’on’the’brick’as’it’is’swung’ has’maximum’magnitude’at’[email protected] A)’ T op. ’ ’ B)’ B oIom.’ C)’ R ight’ D)’The’net’force’has’the’same’ magnitude’at’all’[email protected] Clicker Ques.on Room’Frequency’BA’
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3/3/2014’ PHYS-2010’ 2’ N R B T A’bucket’containing’a’brick’is’swung’in’a’ circle’at’ constant ’speed’in’a’[email protected] plane’as’shown.’The’bucket’is’swung’fast’ enough’that’the’brick’does’not’fall’out.’ The net ’force’on’the’brick’as’it’is’swung’ has’maximum’magnitude’at’[email protected] A)’ T op. ’ ’ B)’ B oIom.’ C)’ R ight’ D)’The’net’force’has’the’same’ magnitude’at’all’[email protected] Clicker Ques.on Room’Frequency’BA’ Answer: Net’force:’ F net ’=’ m a ’=’ m v 2 / R .’ Since’the’speed’ v ’and’radius’R’are’ constant,’the’[email protected]’and’ hence’the’net’force’must’also’be’ constant’in’magnitude.’
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Spring 2014 PHYS-2010 Lecture 21 3/3/2014’ PHYS-2010’ 3’
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Read’ Giancoli’Chapter’5.’ CAPA # 7 due’Tuesday’at’11’pm.’ No Wricen homework this’week!’ This’week:’ Lab # 4 ’“Newton±s’Laws”’(no’ prelab).’ Midterm II ’on’Thursday,’March’6,’at’7:30’pm.’ Pra±.±e exam ’is’posted’on’D2L.’ Review session ’tomorrow’March’4,’5-6’pm,’Duane’G125.’ Exam sea.ng: if’your’TA’is’Rosemary’ Wulf’ or’Andrew’Hess ,’your’exam’is’here,’G1B30.’ if’your’TA’is’ Jake’Fish’or’Clarissa’ Briner,’your’exam’is’next’door,’G1B20.
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