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70. Prevention of hip fractures. Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact is about m/s. If this can be reduced to m/s or less, the hip will usually not fracture. One way to do this is by wearing elastic hip pads. (a) If a typical pad is cm thick and compresses by cm during the impact of a fall, what acceleration (in m/s 2 and in g’s) does the hip undergo to reduce its speed to m/s (b) The acceleration you found in part (a) may seem like a rather large acceleration, but to fully assess its effects on the hip, calculate how long it lasts.