Answer:
The solution is given in the picture attached below
Explanation:
I think it’s 8 hours. I’m sorry if I’m wrong.
I just did 400 divided by 50
Answer:
Negative 9.8 meters per second squared
Explanation:
The negative is for the direction (down, towards the center of the earth). Often this can be estimated as -10 m/s^2 to make calculations easier.
The true scientific way is the last: using the water displacement method