Question: A bicyclist in the Tour de France crests a mountain pass as he moves at 18km/h. At the bottom, 4.0 km farther, his speed is

A bicyclist in the Tour de France crests a mountain pass as he moves at 18km/h. At the bottom, 4.0 km farther, his speed is 75km/h. What was his average acceleration (in m/s2) while riding down the mountain?

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