you need
  • - speedometer;
  • - a device for measuring distance;
  • - stopwatch.
To find the centripetal acceleration, measure the speed of a body moving in a circular path.You can do this by using the speedometer.If you install this device is not possible to calculate the linear velocity.To do this, note the time that was spent on a complete revolution on a circular path.
This time is the period of rotation.Express it in seconds.Measure the radius of the circle on which the moving body is a ruler, tape measure or laser range meters.To find the speed of the product get the number 2 and number π≈3,14 radius R of the circle and divide the result by the period T. This will be the linear velocity of the body v = 2 ∙ π ∙ R / T.
find the centripetal acceleration ats by dividing the square of the linear velocity v on the radius of the circle along which the body moves R (ats = v² / R).Using the formula to determine the angular velocity, frequency and period of rotation find this value for other formulas.
If you know the angular velocity ω, and the radius of the path (a circle of which the body moves) R is the centripetal acceleration is equal ats = ω² ∙ R.When the body is known rotation period T, and the radius of the trajectory R, ​​then ats = 4 ∙ π² ∙ R / T².If you know the speed ν (the number of full rotations per second), define a centripetal acceleration formula ats = 4 ∙ π² ∙ R ∙ ν².
Example: the car, the radius of the wheel is 20 cm, moving on the road at a speed of 72 km / h.Determine the centripetal acceleration extreme points of the wheels.

Solution: linear velocity of points of any wheel will be 72 km / h = 20 m / s.The radius of the wheels turn in meters R = 0,2 m. Calculate the centripetal acceleration, substituting the resulting data into the formula ats = v² / R.Get ats = 20² / 0,2 = 2000 m / s².This centripetal acceleration at uniform rectilinear motion will be at the extreme points of all four wheels of the car.