Which car has the greater deceleration rate?

AI Thread Summary
In a collision between a 2500 kg truck and a 1250 kg car traveling in opposite directions, the truck and car experience the same duration of collision. However, the smaller car undergoes a greater change in velocity due to the momentum transfer, as the combined wrecks will likely move in the direction of the truck. This results in the car experiencing a greater average deceleration rate compared to the truck. The relationship between mass, velocity change, and deceleration is crucial for understanding the dynamics of the collision. Thus, the 1250 kg car has the greater deceleration rate.
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Homework Statement


A 2500 kg truck collides into a 1250 kg car. Both cars were traveling the same speed in opposite directions. Which car has the greater deceleration rate?

2500 kg truck
1250 kg car
the same deceleration

Homework Equations



J=Pf-Pi=Ft


The Attempt at a Solution



i chose the same because a=v/t, and i thought theyd have the same delta v
 
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Welcome to PF!

Assuming the cars stick together in the collision do you then know in which direction the combined wrecks travel right after collision? (hint: use momentum). From this information can you then conclude which car experience the greatest change in velocity and if this also corresponds to the greatest average deceleration? (hint: duration of collision is same for both cars, so greatest change in velocity equals greatest average deceleration).
 


the cars would probably travel in the direction of the truck, so the smaller car would have the greater change in velocity.
 
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