Well water would prob be your best bet, you could extract the salt first and then use a magnet to seperate the iron filing from the sand
Answer:
So the acceleration of the child will be 
Explanation:
We have given angular speed of the child 
Radius r = 4.65 m
Angular acceleration 
We know that linear velocity is given by 
We know that radial acceleration is given by 
Tangential acceleration is given by

So total acceleration will be 
These are all followed and prompted by a question
Sheer tie a very good wjje