Answer:
In the human thoughts, there is possible and impossible. In God's world everything is possible. If you keep thinking this you'll never start to study. Just get up, open the book and start to study like you do. Believe in yourself!
ANSWER: the POWER of force will determine the SPEED of acceleration.
EXPLANATION
Is there any Examples/Answers or is it simply just explain it in a text box?
Answer:
The final speed of the train car is 8.57 m/s.
Explanation:
Given that,
Mass of train car = 1000 kg
Mass of sand = 400 kg
Speed of train car = 12 m/s
We need to calculate the final speed of the train car after the sand is dumped
Using conservation of momentum
...(I)
Put the value in the equation (I)



Hence, The final speed of the train car is 8.57 m/s.