1.

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?

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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