The metal wire in an incandescent lightbulb glows when the lights is switch on and stops glowing when switched off. This simple
2 answers:
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Answer:
The final velocity is
Explanation:
From the question we are told that
The mass of the child is
The initial speed of the child is
The mass of the wagon is
The initial speed of the wagon is
The mass of the ball is
The initial speed off the ball is
Generally the initial speed of the system (i.e the child , wagon , ball) is
Generally from the law of linear momentum conservation
Here is the momentum of the system before the ball is dropped which is mathematically represented as
=>
=>
and
is the momentum of the system after the ball is dropped which is mathematically represented as
=>
So
=>