Motion with Constant Acceleration

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SUMMARY

The discussion focuses on a kinematics problem involving a motorcyclist who decelerates uniformly over 3.2 seconds, covering a distance of 40 meters before stopping. The relevant kinematic equation used is s = (u + v)/2 * t, where 's' is the distance, 'u' is the initial velocity, 'v' is the final velocity (0 m/s), and 't' is the time. By rearranging the equation and solving for 'u', the initial velocity can be determined as 25 m/s.

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JustGracie
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1. The problem
A motorcyclist slows down uniformly as he approaches a red light. He takes 3.2 seconds to come to a halt and travels 40m in this time.
How fast was he traveling initially?


Homework Equations



s=(u+v)/2*t
 
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Any other kinematic equations? If you can find his acceleration, I bet you could find his initial velocity.
 

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