Acat is being chased by a dog. both are running in a straight line at constant speeds. the cat has a head start of 3.8 m. the dog is running with a speed of 8.9 m/s and catches the cat after 6.0 s. how fast did the cat run?

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.