Thursday
October 23, 2014

Homework Help: physics

Posted by sam on Friday, May 29, 2009 at 7:50am.

we had to watch an animation which showed two balls, each traveling on a straight horizontal line at different speeds.
the graph of position vs time and velocity vs time are given.

The red ball has a linear graph and the coordinates are (0,0), (1,5), (2,10), (3,15), and (4,20)

for the blue ball:(0,0), (1,1), (2,2.5), (3,4.5), (4,7)

it is asked:

If the motion was allowed to continue the blue (lower) ball would reach the finish line (20m) at some time Δt after the red ball. What is Δt?

i though that it would take the blue ball around 9 seconds to reach the finish line,but I don't think this is right

thanks!

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