Answer:
Let's analyze the given statements one by one:
A) Acceleration of the rocket while ascending on its fuel is 2/8 m/s:
This statement is incorrect. The acceleration of the rocket while ascending on its fuel is not provided in the given information. Therefore, we cannot determine the exact value of the rocket's acceleration.
B) Fuel of the rocket was finished at a height 100 m above the ground:
This statement is incorrect. The time at which the fuel of the rocket is finished is given as 4.0 seconds after the bolt is dropped. However, the height at which the fuel is finished is not provided. Therefore, we cannot determine if it is 100 meters above the ground.
C) Maximum speed of the rocket during its flight is 40 m/s:
This statement is incorrect. The maximum speed of the rocket during its flight is not provided in the given information. Therefore, we cannot determine the exact value of the rocket's maximum speed.
D) Total air-time of the rocket is 15 seconds:
This statement is incorrect. The total air-time of the rocket is not provided directly in the given information. However, we can calculate it by adding the time taken for the fuel to finish (4.0 seconds) and the air-time of the bolt (2.0 seconds). Therefore, the total air-time of the rocket is 6.0 seconds, not 15 seconds.
In summary, none of the statements provided are correct based on the given information. The acceleration of the rocket while ascending on its fuel, the height at which the fuel is finished, the maximum speed of the rocket, and the total air-time of the rocket cannot be determined with the given information.