A car's bumper is designed to withstand a 7.20-km/h (2.0-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.165 m while bringing a 840-kg car to rest from an initial speed of 2.0 m/s.

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A car's bumper is designed to withstand a 7.20-km/h (2.0-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.165 m while bringing a 840-kg car to rest from an initial speed of 2.0 m/s.

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Step 1

Given:

The mass of the car is m = 840 kg

The initial speed of the car is vi = 2 m/s

The bumper cushions the shock by absorbing the force over a distance is d =  0.165 m

 

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