What is the principle of Kater pendulum?
According to the principle of KAter’s pendulum, when the pendulum is suspended upside down from the centre of its oscillation, the period of the swing remains unchanged and the new oscillation centre is the old pivot point.
Is it necessary that the time periods in Kater’s pendulum must be exactly equal explain?
Using the Kater method, it’s not entirely necessary to achive exactly equal periods about two suspension points. One can move the adjustable weight, measuring periods at several recorded positions of the weight for each of the two suspension points.
Why katers pendulum is reversible?
A reversible pendulum is a special design of a normal physical pendulum. The reduction in the length of the pendulum then matches the distance between the two mounting points. This makes it easier to determine the local acceleration due to gravity from the period of oscillation and the reduced pendulum length.
Why is Kater’s pendulum more accurate?
Kater’s pendulum was used as a gravimeter to measure the local acceleration of gravity with greater accuracy than an ordinary pendulum, because it avoids having to measure l.
How can a pendulum be used to measure gravity?
Calculate the time of one oscillation or the period (T) by dividing the total time by the number of oscillations you counted. Use your calculated (T) along with the exact length of the pendulum (L) in the above formula to find “g.” This is your measured value for “g.”
Why is Kater’s pendulum more accurate than bar pendulum?
The point of suspension also is not accurately determined in a simple pendulum. So once a near equality in time period is obtained on both sides of the centre of gravity of the metallic bar, determining the length of the pendulum becomes more accurate, and so does determining the acceleration g due to gravity.
What is meant by Kater’s pendulum?
: a compound pendulum with adjustable knife edges placed respectively at the center of suspension and near the center of oscillation and used to determine acceleration of gravity by means of the period of oscillation.
What is the use of knife edge in Kater’s pendulum?
Its function is to provide as near equal air resistance to swinging as possible in either suspension, which happens if W1 and W2, and separately K1 and K2, are constrained to be equidistant from the ends of the metal rod. The centre of mass G can be located by balancing the pendulum on an external knife edge.
Where is the value of g zero on the earth?
Since, mass m of an object can never be 0. Therefore, when F = 0, then g has to be 0. Thus, the value of g is zero at the centre of the Earth.
What is the advantage of compound pendulum over simple pendulum?
The main difference between simple pendulum and compound pendulum is that, in a simple pendulum, the distance between the centre of gravity of the suspended body and the axis of suspension is large compared to the dimensions of the suspended body whereas, in a compound pendulum, the dimensions of the suspended body are …
What is the aim of simple pendulum experiment?
The goal of this experiment was to determine the effect of mass and length on the period of oscillation of a simple pendulum. Using a photogate to measure the period, we varied the pendulum mass for a fixed length, and varied the pendulum length for a fixed mass.
What is the relationship between length and period of a pendulum?
The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.)
What was the result of the Kettlewell experiment?
Kettlewell conjectured that participation in the experiment might have conditioned the birds to become specialists on moths, and introduced a broad spectrum of other endemic insects to widen their feeding interests.
Why was Kettlewell’s mark release recapture technique important?
Kettlewell’s experiments are significant both empirically, as an early demonstration of natural selection, and methodologically, as a demonstration of how the mark–release–recapture technique pioneered by Fisher and Ford (1947) for estimating population size might be used to estimate selective advantages in field populations.
Which is the most beautiful experiment in evolutionary biology?
As will be shown below, Crease’s analysis makes sense of why H. B. D. Kettlewell’s classic mark–release–recapture experiments are often regarded as among the most beautiful experiments in evolutionary biology.
Which is the most beautiful example of natural selection?
H. B. D. Kettlewell’s work on the phenomenon of industrial melanism is widely regarded as the classic demonstration of natural selection and one of the most beautiful experiments in evolutionary biology.