Grade 11 Physics Quiz
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A roadside barrier is tested with a 1500 kg1500\ \text{kg} car approaching at 18 m/s18\ \text{m/s}. The redesigned barrier redirects the car so that it rebounds directly backward at 4.0 m/s4.0\ \text{m/s}. The collision lasts 0.15 s0.15\ \text{s}.
What minimum average horizontal force must the barrier supports withstand during this test?
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