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ENGINEERING, CS 2020 HSC 4 MC

The diagram shows a model of a windmill which is designed to lift a mass as the turbine rotates.
 

A mass of 80 grams is lifted a distance of 200 mm by the windmill.

What is the work done by the windmill?

  1. `0.16\ \text{J}`
  2. `16\ \text{J}`
  3. `160\ \text{J}`
  4. `1600\ \text{J}`
Show Answers Only

`A`

Show Worked Solution

Convert units:

`80\ \text{grams} = 0.08\ \text{kilograms}`

`200\ \text{mm} = 0.2\ \text{m}` 

`:.W= Fd= (0.08 xx 10) xx 0.2= 0.16\ text{J}`

`=>A`


Mean mark 55%.

Filed Under: Engineering Mechanics Tagged With: Band 5, smc-3714-90-Work

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