A2kg railroad car is rolling 6.00m/s when 7000kg olaf id gravel is suddenly dropped in. what’s the cars speed after gravel is loaded ?

The cars speed after the gravel is loaded, V = 4.44 m/s

Explanation:

Given data,

The mass of the railroad car, m = 20000 kg

The velocity of the railroad car, v = 6 m/s

The mass of the dropped gravel, m =7000 kg

The momentum of the railroad car,

                                 P = mv

                                    = 20000 x 6

                                    = 120000 kg m/s

According to the law of conservation of momentum,

                                 P = V (M + m)

                                 V = P/ (M + m)

                                    = 120000 / (20000 + 7000)

                                    = 4.44 m/s

Hence, the cars speed after the gravel is loaded, V = 4.44 m/s

labor day, patriot day, leaves start to change colors then fall from the tree

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!