le 3.2 The position of an objectmoving along x-axis is given by x a+be

1.	le 3.2 The position of an objectmoving along x-axis is given by x a+bewhere a 8.5 m, b 2.5 m s2 and t ismeasured in seconds. What is its velocity att-O s and t 2.0 s. What is the averagevelocity between t # 2.0 s and t:40 s?amp
Answer» X = a + bt^2v = 2bt Velocity at t = 0 is 0Velocity at t = 2s is = 22.52 = 10 m/s At t = 2sx = 8.5 + 2.52^2x = 18.5m At t = 4s x = 8.5 + 2.54^2x = 48.5m Average velocity = (48.5 - 18.5) / 2 = 15m/s

le 3.2 The position of an objectmoving along x-axis is given by x a+bewhere a 8.5 m, b 2.5 m s2 and t ismeasured in seconds. What is its velocity att-O s and t 2.0 s. What is the averagevelocity between t # 2.0 s and t:40 s?amp

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 = 15m/s