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PHYSICS QQUUeessttioonn?? |
A scientists is testing two types of bicycle helmets. She drops each helmet from a height of two metres onto a cement slab. Althought the impulse was the same for each helmet , helmet A was crushed in 0.05 seconds and helmet B was crushed in 0.02 seconds . Which of the following statements is true? A. Helmet A is the safer helmet. B. Helmet B is the safer helmet. C. Helmet A and helmet B are equal. D. Insufficient information is given to dtermine which is the better helmet. C. Helmet A and helmet B are equal. If both crush at the same height, that means that both need the same force to crush. So, both are equally safe, regardless the time the helmets took to break. |
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