Has he considered a nail on a string?

Just kidding, but I have a great little paperback called "Science for the
Airline Passenger".  One of the experiments is to use a goniometer (angle
meter) conveniently printed on the back cover to calculate your
acceleration during takeoff by holding a string and a weight against the
book.  I've done it and it's pretty accurate,  you end up with a final
speed near the actual plane speed.  And no need to turn it off during
takeoff and landing!

Regards, Ted



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