force*time=changeofmomentum
solve for force.
You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested by smashing them into fixed, massive barriers at 50 km/h (31 mph). A new model of mass 1400 kg takes 0.18 s from the time of impact until it is brought to rest. Calculate the average force exerted on the car by the barrier. Calculate the average deceleration of the car.
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