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An object with a mass of #2 kg# is hanging from an axle with a radius of #2 cm#. If the wheel attached to the axle has a radius of #16 cm#, how much work would it take to turn the wheel a length equal to the circumference of the axle?

Answer 1

Isabella Alvarez

The work done is #=2.46J#

Mass #=2kg#

Radius of axle #=0.02m#

Radius of wheel #=0.16m#

Cicumference of axle #=2pir=2*0.02*pi=0.126m#

Work done #=mgh=2*9.8*0.126=2.46J#

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Answer 2

Nathan Ashcroft

The work required to turn the wheel a length equal to the circumference of the axle is approximately 1.57 joules.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.