An train car of total mass of 13000 kg is pulling into a station and slowing down with an acceleration of -4.56 m/s^2. before the train pulls into the station, a group of 7 stowaway jump off the train. each stowaway has a mass of 66 kg. if the braking force on the train remains the same, what will be the acceleration of the train once the stowaways jump out of the train?

-4.73 m/s²

Each jumper represents about 1/2 of 1% of the mass of the train, so together they total about 3.5% of the mass of the train. If the mass decreases by 3.5% and the braking force remains the same, the acceleration (magnitude) will increase by about 3.5%.

The acceleration will be about 0.17 m/s² more (in magnitude) than it was, or about -4.73 m/s².

e/c, where e is its total energy

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.