SOLUTION: Please help me on this: A racing snail quickly slows down before crashing into a pedestrian along the race course it was moving at a rate of 100cm/min and dropped it's speed dow

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Question 575892: Please help me on this:
A racing snail quickly slows down before crashing into a pedestrian along the race course it was moving at a rate of 100cm/min and dropped it's speed down to 40cm/min in only 3 seconds. What was it deceleration rate?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
the deceleration is ( change in speed ) / ( change in time )
+%28+40+-+100+%29+%2F+%28+3%2F60+%29+ ( cm/min ) / min
Note that 3 sec = 3/60 min
+%28-60+%29+%2F+%283%2F60%29+
+%28-60%29%2A%28+60%2F3%29+
+-3600%2F3+=+-1200+ (cm/min)/min
+-1200+ (cm/min)/min x +1%2F100+ m/cm = +-12+ m/min2
The deceleration rate is -12 meters/minute per minute