Post a New Question

physics

posted by .

A 12100 kg railroad car travels alone on a level frictionless track with a constant speed of 20.5 m/s. A 5850 kg load, initially at rest, is dropped onto the car. What will be the car's new speed?

  • physics -

    An application of the law of conservation of linear momentum, in the horizontal direction, will tell you the answer.

    Give it a try.

    Adding a load by dropping from above will not change the horizontal momentum.

  • physics -

    12100kg-5850kg=6250kg/100
    1/2kv2

    1/2(625)(20.5)^2=

    131328.125m/s

  • physics -

    umm, im sorry about that answer, but really? 131 thousand meters per second? might want to check your math there, that's 131 kilometers per second which is pretty fast...

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question