A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm (Fig .15.78). Given that the bucket ascends in 1 minute 28 seconds with a uniform speed of 1.1 m/s. Calculate the number of complete revolutions the wheel makes in raising the bucket.

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Solution

A bucket is pulled from a well using a rope. We have,

Velocity by which rope is pulled

Diameter of the pulley

Time taken to pull the rope,

So total length of the rope pulled,

Therefore,

So,

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A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm (Fig .15.78). Given that the bucket ascends in 1 minute 28 seconds with a uniform speed of 1.1 m/s. Calculate the number of complete revolutions the wheel makes in raising the bucket.

A bucket is pulled from a well using a rope. We have, Velocity by which rope is pulled Diameter of the pulley Time taken to pull the rope, So total length of the rope pulled, Therefore, So,

A bucket is pulled from a well using a rope. We have,

Velocity by which rope is pulled

Diameter of the pulley

Time taken to pull the rope,

So total length of the rope pulled,

Therefore,

So,