Physics: Uniform Motion

A Metra commuter train leaves
Union Station in Chicago at 12 noon. Two hours later, an
Amtrak train leaves on the same track, traveling at an
average speed that is 50 miles per hour faster than the
Metra train. At 3 PM the Amtrak train is 10 miles behind the
commuter train. How fast is each going?

Jhun Vert's picture

Consider the figure below:



Given: $v_A = v_M + 50$

And from the figure:
$3v_M = v_A + 10$


$v_M = 30 ~ \text{mph}$

$v_A = 80 ~ \text{mph}$


sir anong gamit mo paggawa ng figure?

Jhun Vert's picture

For the screenshot above, Microsoft OneNote.

Add new comment

Deafult Input

  • Allowed HTML tags: <img> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <sub> <sup> <blockquote> <ins> <del> <div>
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
  • Mathematics inside the configured delimiters is rendered by MathJax. The default math delimiters are $$...$$ and \[...\] for displayed mathematics, and $...$ and \(...\) for in-line mathematics.

Plain text

  • No HTML tags allowed.
  • Lines and paragraphs break automatically.