HELP For this problem, use x (cm), v(cm/s) and a(cm/s2).
a) What is the acceleration of the object?
b) Find the time needed for vxf = 0.
c) What is xf when vxf = 0? This is asking for xf using t in part b.
d) What is vxf when t = 2 sec?

Answer choice a test prep

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

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