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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 J
  2. 16 J
  3. 160 J
  4. 1600 J
Show Answers Only

`A`

Show Worked Solution

Convert units:

80 grams = 0.08 kilograms

200 mm = 0.2 m 

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

 
`=>A`


Mean mark 55%.