Physics, 18.11.2020 16:50 naynay4evr
A 20-kg child is coasting at 3.3 m/s over flat ground in a 4.0-kg wagon. The child drops a 1.0-kg ball out the back of the wagon. What is the final speed of the child and wagon?
Answers: 2
is the momentum of the system before the ball is dropped which is mathematically represented as 
is the momentum of the system after the ball is dropped which is mathematically represented as 
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A 20-kg child is coasting at 3.3 m/s over flat ground in a 4.0-kg wagon. The child drops a 1.0-kg ba...
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