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# Mechanics Questions

A rock dropped from a cliff covers one-third of its total distance to the ground in the last second of its fall. Air resistance is negligible. How high is the cliff?

Bats use echolocation to determine their distance from objects they cannot easily see in the dark. The time between the emission of a high-frequency sound pulse (a click) and the detection of its...

A train pulls away from a station with a constant acceleration of 0.37 m/s2. A passenger arrives at a point next to the track 6.1 s after the end of the train has passed the very same point. What...

The cheetah can run as fast as 113 km/h, the falcon can fly as fast as 161 km/h, and the sailfish can swim as fast as 105 km/h. The three of them run a relay with each covering a distance L at maximum...

# Trying to program an RPM Gauge

I've an RPM Gauge that spins the needle from 0 - 90 degrees, with the needle towards bottom at 0, spinning to the left towards -90, and up towards 180. It has to accurately reflect around 1 to 8000...

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