collision of railroad cars and gravitational attraction
Not what you're looking for?
1. A 9000kg railroad car moving at 3m/s strikes a stationary (not moving) 5000kg railroad car. what is the kinetic energy of the 9000kg railroad car before the collision? What is the momentum of the 9000kg railroad car before the collision? If the two railroad cars couple and move off together after the collision, what is their velocity?
2. A star has a planet held in orbit by gravitational attraction. If the mass of the star were doubled, what effect would this have on the gravitational attraction between the star and its planet ? If the distance between the stars and planet were 3 times as great, what effect would this have on their gravitational attraction for each other?
Purchase this Solution
Solution Summary
It investigates the collision between two radilroad cards and the gravitational attraction between the star and its planet. The solution is detailed and has '5/5' rating.
Solution Preview
1. What is the kinetic energy of the 9000kg railroad car before the collision?
kinetic energy is 0.5mv^2 = 0.5 * 9000 * 3^2 = 40500 J.
What is the momentum of the 9000kg railroad car before the collision?
mv = 9000 * 3 = ...
Purchase this Solution
Free BrainMass Quizzes
Variables in Science Experiments
How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.
Basic Physics
This quiz will test your knowledge about basic Physics.
The Moon
Test your knowledge of moon phases and movement.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.