physics ( please help me)

a railroad handcar is moving along striaght, fricionless tracks. In each of the following cases the car initially has a total mass (car and contents of magniude 4.00 m/s^1. Find the final velocity of the car in each of the three cases.

A) a 40.0 kg mass is thown sideways out of the car with a velocity of magnitude 2.00 m/s^1 relative to the car.
B) a 40.0 kg mass is thrown backward (to the west)out of the car with a velocity of magnitude 4.00 m/s^1 relative to the initial motion of the car.
C) a 40.0 kg mass is thrown into the car with a velocity of the magnitude 6.00 m/s^1 relative to the ground and opposite in direction to the velocity of the car.

  1. 👍
  2. 👎
  3. 👁
  1. a) 4.00m/s
    b)velocity of object is 0, so your answers should be (Mass of car * 4.00 )/(Mass of car - 40.0 kg)
    c) 2 initial velocities this time, and the object is going the opposite direction. You should have [(Mass of Car * 4.00) - (40kg *6) ] / (Mass of car + 40kg)

    1. 👍
    2. 👎
  2. a car of mass 500 is travelling at 24.a lion of 100kg drop onto the roof the car from the over handing branch show that the car will slow down to speed lot 20m/s.

    1. 👍
    2. 👎
  3. help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"""""""

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A 3800 kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg/min. ignoring friction with the tracks what is the speed of the car

  2. physics

    A railroad car of mass 2.15 ✕ 104 kg moving at 3.15 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) What is the speed of the

  3. Physics

    A 15000 kg railroad car moving 7m/s to the North collides with and sticks to another railroad car of the same mass that is moving the same direction at 1.5 m/s. What type of collision is this? What is the velocity of the joined

  4. Physics

    A railroad car with a mass of 12400 kg collides and couples with a second car of mass 18700 kg that is initially at rest. The first car is moving with a speed of 7.7 m/s prior to the collision. (a) What is the initial momentum of

  1. e.s

    Why does Interstate 95 seem to follow the fall line?(1 point) Abandoned railroad tracks share the same route. The fall line is flat and was easy to construct a road on. It connects cities that were established on the fall line. It

  2. physics

    A railroad car of mass 2500 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 2.20 m/s. (a) What is the speed of the three

  3. physics

    A railroad car of mass 2.7 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) What is the speed of the three

  4. physics

    Calculate the magnitude of the linear momentum for the following cases. (a) a proton with mass 1.67 10-27 kg, moving with a speed of 4.00 106 m/s (b) a 16.5 g bullet moving with a speed of 270 m/s (c) a 70.5 kg sprinter running

  1. History

    How does the federal court system decide which criminal cases to take? A) they take cases that have already seen state courts B) a grand jury decides if each case has merit •• C) they take cases that are being appealed D) a

  2. Physics

    A 10,000 kg railroad car traveling north at 10 m/s collides with a 5,000 kg rail car also moving north but at an unknown speed. After the collision, the two cars lock together and move north at 8 m/s. How fast was the second car

  3. history

    How did George Westinghouse contribute to railroad transportation? a. his invention of air brakes made railroad travel safer and faster.***** b. his development of the sleeping car made railroad travel much more comfortable. c.

  4. math

    Suppose y , the number of cases of a disease, is reduced by 11% per year. (a) If there are initially 10,000 cases, express y as a function of t , the number of years elapsed. (b) How many cases will there be 6 years from now? (c)

You can view more similar questions or ask a new question.