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2. The position of an object moving along x-axis !8.5m, b-2.5 m/s2 andgiven by x-atbt where a-is measured in seconds (a) What is the velocity att=0s and t=2s, (b) what is the average velocitybetween t-2s and t-4s? |
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Answer» X = a + bt^2v = 2bt Velocity at t = 0 is 0Velocity at t = 2s is = 2*2.5*2 = 10 m/s At t = 2sx = 8.5 + 2.5*2^2x = 18.5m At t = 4s x = 8.5 + 2.5*4^2x = 48.5m Average velocity = (48.5 - 18.5) / 2 = 18m/s sis exam point telling the answer sis exam point telling the answer |
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