1.

To simulate car accidents, auto manufacturers study the collisions of moving cars with mounted springs of different constants. Consider a typical simulation with a car of mass 1000 kg moving with a speed 18.0 kmh^(-1) on a smooth road and colliding with a horizontally mounted spring of spring constant 6.25xx10^(-3)Nm^(-1). What is the maximum compression of the spring.

Answer»

Solution :At maximum COMPRESSION `x_(m)`, the K.E. of the car is converted entirely into the P.E. of the spring.
`1/2kx_(m)^(2)=1/2mv^(2)`
or `x_(m)=2m`


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