Posted by armando on Thursday, August 25, 2011 at 6:34pm.
d = vi t + (1/2) a t^2
24 = vi (4) + (1/2) a (4)^2
88 = vi (8) + (1/2) a (8^2)
--------------------------------
48 = 8 vi + 16 a
88 = 8 vi + 32 a
----------------- subtract
-40 = -16 a
a = 2.5 m/s^2
24 = 4 vi + 20
vi = 1 m/s
check my arithmetc
a motor cyclist goes from station a to b at 40km/h and then returns from b to a 120km/h.calculate average speed,average velocity during the round trip
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