5a) A 5-kg object travels at a constant velocity of 25 m/s easton a smooth, frictionless surface. An 8-kg object travels at aconstant velocity of 55 m/s west on the same surface and thencollides directly with the 5 kg-object. The two objects sticktogether. What is the velocity of the two-object system, just afterthey collide and stick together?
b) After a .20 kg street-hockey puck is hit, it has an initialvelocity of 35 m/s and travels on a uniform, horizontal cementsurface and uniformly slows to a stop in 6 seconds (due to thefriction between the puck and the cement). What is the coefficientof kinetic friction between the puck and the cement surface?
c) A horizontal spring has a spring constant of 150 N/m. ; a0.25 kg mass is placed at the spring's free end, on a level,horizontal, frictionless surface. The spring- mass system iscompressed 12 cm, and then released from rest. What is the maximumspeed, in meters per second, of the released mass?
