0.8kg would be a pretty small cat. Maybe a guinea pig.
one for the physicists
It's not as if it makes much difference these days with calculators and all..
Except you're still expected to be able to estimate the answer to your question without using a calculator, to ensure a misunderstanding doesn't result in your Mars Orbiter disintegrating. At least that appears to be the case in Y6 at our local school when I've heard the teacher mention estimating the answer several times when I've been in there. In which case using 10 for g is reasonable - I've certainly used that before now when doing a quick check in my head where I only care about the order of magnitude.
What if the box falls out of the overhead luggage shelf of a plane on a treadmill?
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