Consider the following scenario: In a railroad yard, a train is being assembled. An empty boxczi, coasting at 3 m/s, strikes a loaded car that is stationary, and the car couple together. Each of the boxcars has a mass of 9,000 kg when empty, and the loaded car contains 55,000 kg of lumber. Assuming momentum is conserved, what is the total momentum of the system before and after the collision?​

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?