Question 1153230: Q1 Water is taken from a well 11 m deep in a bucket, the rope winding on to a drum 35 cm in diameter.
a. Through what angle does the handle turn in winding up 1 metre of rope?
b. How many revolution of the handle does it take to bring the bucket up from the bottom?
c. If the arm of the handle is 42 cm long, how far does the handle of the winder travel when bringing the bucket up from the bottom?
Q2 A circular wire clip of radius 7 mm is with a gap of 7 mm between the ends. Calculate the total length of wire in the clip to the nearest mm, given that about 4 mm are used altogether in making the turnovers at the ends
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Water is taken from a well 11 m deep in a bucket, the rope winding on to a drum 35 cm in diameter.
a. Through what angle does the handle turn in winding up 1 metre of rope?
Find the circumference C of the drum.
1 turn (360 degs) moves the bucket that distance.
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b. How many revolution of the handle does it take to bring the bucket up from the bottom?
Divide 11 meters by C.
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c. If the arm of the handle is 42 cm long, how far does the handle of the winder travel when bringing the bucket up from the bottom?
The # of turns in (b) times the circumference with r = 42 cm.
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Q2 A circular wire clip of radius 7 mm is with a gap of 7 mm between the ends. Calculate the total length of wire in the clip to the nearest mm, given that about 4 mm are used altogether in making the turnovers at the ends
Not clear.
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