question 1 -
Suppose that the Lo = 661 m main span of a steel bridge had noexpansion joints. How much longer would the bridge be if thetemperature increased from a cold winter at Tcold = –32 oC to awarm summer at Twarm = 30 oC? (The coefficient of linear expansionfor steel is (alpha) α = 11 . 10-6 1/Co.)
question 2 -
A ball rolls along a surface, starting with an initial velocityof vo = 59 m/s. Friction reduces the ball's finalvelocity to vf = 12 m/s in a time of t = 2.7 s.
Determine the ball's acceleration a (type it as a negative numberbecause it reduced the ball's velocity).
