5a) A 5-kg object travels at a constant velocity of 25 m/s east on a smooth,...

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Physics

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?

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4.0 Ratings (687 Votes)

5 a Let m1 5kg travelling with an initial velocity u1 25ms in the east direction and m2 8kg travelling with an initialvelocity u2 55ms in the west direction They stick togetherafter See Answer

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