Aboxcar of mass 8700 kg is traveling at 11.0 m/s strikes a second boxcar moving in the same direction at 2.2 m/s. the two stick together and move off with a speed of 4.00 m/s. what is the mass of the second box car? explain your reasoning.

m = 33833.3 kg

Explanation:

let M be the mass of boxcar 1 and V be the velocity of boxcar 1, let m be the mass of boxcar 2 and v be the velocity of boxcar 2.

from conservation of linear momentum:

M×Vi + m×vi = vf(M + m)

M×Vi - M×vf = m×vf - m×vi

    M(Vi - vf) = m(vf - vi)

                m = [M(Vi - vf)]/(vf - vi)

                    = [(8700)(11.0 - 4.00)]/(4.00 - 2.2)

                    = 33833.3 kg

Therefore, the mass of boxcar 2 is 33833.3 .

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada