Before solving [a problem],
show what dimensional
analysis alone reveals: the
form the answer must take and
which quantities can't appear.
Then solve it and compare.

Solve It With Units Alone

How far units get you before any real work starts.

Prompt

Before solving [a physics problem], show me what dimensional analysis alone can tell us — the form the answer must take, and which quantities can't possibly appear. Then solve it properly and compare.