Answer :
Kinetic energy of any object is (1/2) x (object's mass) x (object's speed)².
If the speeds are the same, you can see from this formula that the bigger
mass has the bigger kinetic energy, in direct proportion.
The train has (12,000/900) = 13 and 1/3 times as much kinetic energy as the car has.
The correct choice is 'B'.
(In the real world, 12,000 kg might only cover the locomotive.)
If the speeds are the same, you can see from this formula that the bigger
mass has the bigger kinetic energy, in direct proportion.
The train has (12,000/900) = 13 and 1/3 times as much kinetic energy as the car has.
The correct choice is 'B'.
(In the real world, 12,000 kg might only cover the locomotive.)
Answer: It would be B.
Explanation:
It would be B because since the car is 900 kg and the train is 12,000 kg the train is much bigger. It wouldn't be A because we all know that 12 is greater then 9. It would go the same for C as well. So thecorrect answer is B since the train is much bigger thta means it has more kinetic energy.