A position versus time graph is shown. Which statement accurately describes the motion of the object in the graph above?

a) It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
b) It moved from 0 cm to 6 cm at an average speed of 1 cm/s.
c) It moved from 0 cm to 10 cm at an average speed of 2 cm/s.
d) It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.

(d is incorrect btw)

Your answer is 1.5 hope i  

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.

You need to calculate the string in between two masses

Bis the