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hopelessromantic13
Group Title
A window washer pulls herself upward using the bucketpulley apparatus. The mass of the person plus the bucket is 65 kg.
(a) How hard must she pull downward to raise herself slowly at constant speed?
(b) If she increases this force by 10%, what will her acceleration be?
 one year ago
 one year ago
hopelessromantic13 Group Title
A window washer pulls herself upward using the bucketpulley apparatus. The mass of the person plus the bucket is 65 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? (b) If she increases this force by 10%, what will her acceleration be?
 one year ago
 one year ago

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Diwakar Group TitleBest ResponseYou've already chosen the best response.1
Consider the free body diagrams as shown in the file attached. Let the acc of system is a. For the washer T+Nm1g=m1a ............................(1) For the bucket TNm2g=m2a ............................(2) (a) a=0 Eqns (1) and (2) become T+Nm1g=0 TNm2g=0 Adding and rearranging, T=(m1+m2)/2g T=325N (b) We are specified the value of T here as 325+32.5=357.5N eqns (1)and (2) become 357.5+Nm1g=m1a 357.5Nm2g=m2a Adding, 715(m1+m2)g=(m1+m2)a Solve for 'a'
 one year ago

hopelessromantic13 Group TitleBest ResponseYou've already chosen the best response.0
thanks :)
 one year ago
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