What is the average deceleration during braking?

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SUMMARY

The average deceleration during braking for a vehicle traveling at 80 km/h, which comes to a complete stop in 2.8 seconds, is calculated to be 7.94 m/s². The initial velocity is converted from kilometers per hour to meters per second, resulting in 22.22 m/s. The formula used for calculating average acceleration is the change in velocity divided by the time elapsed, confirming the deceleration value as -7.94 m/s², which is expressed positively as average deceleration.

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The driver of an automobile traveling at 80 km/h suddenly slams on the brakes and stops in 2.8 s. What is the average deceleration during braking

Velocity of driver=(80 km/h)(1 h/3600 s)(1000 m/1 km)=22.22 m/s

average acceleration=change of velocity/time elapsed
Acceleration = final velocity - initital velocity / time
Acceleration=(0 - 22.22 m/s)/2.8 s=-7.94 m/s/s

Average deceleration= 7.94 m/s/s

Just double checking
 
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You got that one right.
 
Thank you. Just trying to make sure everything was setup correctly
 

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