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A railroad diesel engine weighs three times as much as a freightcar. If the diesel engine coasts at 6 km/h into a freightcar that is initially at rest, how fast do the two coast after they couple together?
Lillian (mass 34.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 5.0 m/s. What is the speed of Lilian and her dog after the catch?
Lillian (mass 34.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 5.0 m/s. What is the speed of Lilian and her dog after the catch?