ramp velocities

kavitha_grade5 - Thursday, December 03, 2009 9:29:01 AM

formulas


potential energy: mgh
kinetic energy = (1/2)mv**2
v = sqrt(2gh)

kavitha_grade5 - Thursday, December 03, 2009 9:29:28 AM

value of gravity

kavitha_grade5 - Thursday, December 03, 2009 9:34:47 AM

its value


9.81 m/s2 (meters per second squared)
or 
32.17 ft/s2

kavitha_grade5 - Thursday, December 03, 2009 9:36:52 AM

Here is google calculator

kavitha_grade5 - Thursday, December 03, 2009 9:37:45 AM

32.17 feet in inches

kavitha_grade5 - Thursday, December 03, 2009 9:38:51 AM

That is 386 inches

kavitha_grade5 - Thursday, December 03, 2009 9:39:25 AM

So "g"in inches is 386 inches per square second

kavitha_grade5 - Thursday, December 03, 2009 9:41:02 AM

For a height of 10 inches the speed at the bottom of the ramp is


sqrt(2 * 386 * 10) inches

kavitha_grade5 - Thursday, December 03, 2009 9:41:53 AM

lets ask google for it

kavitha_grade5 - Thursday, December 03, 2009 9:42:13 AM

sqrt(2 * 386 * 10)

kavitha_grade5 - Thursday, December 03, 2009 9:42:40 AM

The answer is 87 feet per second

kavitha_grade5 - Thursday, December 03, 2009 12:47:21 PM

Example formulato calculate velocity in Excel

Type the following in a cell


=SQRT(2 * 386 * B4)

The "B4" represents another cell whose value you are using. This is shown here as a pattern of entering formulas in excel spreadsheets.

kavitha_grade5 - Thursday, December 03, 2009 12:51:09 PM

Here is how you can calculate the angle using excel


=DEGREES(ASIN(side1/side2)

kavitha_grade5 - Thursday, December 03, 2009 12:52:00 PM

projection sin cos

kavitha_grade5 - Thursday, December 03, 2009 12:54:29 PM

formulas to calculate angles