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a sudden stop, a car's seatbelt provides the force that stops the passenger.


chrisbaileyis

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I'll give you some hints...

 

First, you need to find the acceleration of the passenger as the car stops.  To do this, first convert the initial speed of the car from km/hr to meters/second (http://www.aplusphysics.com/courses/regents/videos/Metric_System/Metric_System.html).

 

Next, calculate the acceleration of the passenger: http://www.aplusphysics.com/courses/honors/videos/KinEqns_Hon/KinEqns_Hon.html

 

Finally, once you know the passenger's acceleration, you can calculate the force using Newton's 2nd Law: http://www.aplusphysics.com/courses/honors/videos/N2Law_Regents/N2Law.html

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