You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested

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You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested by smashing them into fixes, massive barriers at 50km/h (30mph). A new model of mass 1500 kg takes 0.15s from the time of impact until it is brought to rest.
(a) Calculate the average force exerted on the car by the barrier.
(b) Calculate the average deceleration of the car.
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