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The radius of a circle is 3 centimeters. What is the length of a 90° arc?

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Circumference is pye times twice the radius or by the diameter
3.1417 X 6 ( diameter or 2 times the radius )= 18.8496
90 degrees is 1/4 of the circumference
18.8496 divided by 4 = 4.7124 cms
arc of 90 degrees =4.74124 cms

Posted on May 03, 2017

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How will I determine the radius of gyration using bifilar suspension?


https://www.scribd.com/doc/109721558/Bifilar-Suspension


https://www.scribd.com/doc/109721558/Bifilar-Suspension


THEORY OF MACHINES AND MECHANISNMS I LAB MANUALEXPERIMENT NO. 2 TITLE : RADIUS OF GYRATION BY BIFILAR SUSPENSION METHOD
AIM:
To determine the radius of gyration of given bar using bifilar suspensionmethod.
APPARATUSUSED:
Uniform steel bar, cylindrical weights, stop watch.
DESCRIPTION
Fig 1 shows the general arrangement for carrying out experiment. A
SET UP
uniform rectangular section bar is suspended from support frame by twoparallel cords.

Two small chucks fitted in the frame and other endssecured in bifilar bar. Ends of these cords pass through a chuck so as tofacilitate for change in length of the cord it is possible to adjust length of chord by loosening the chuck.The suspension may also be used to determine radius of gyrationof any body,In this case the body under investigation is bolted to thecenter. Radius of gyration of combined bar and body is then determined.
PROCEDURE
1) Suspend the bar from chuck and adjust length of chord ' L' convenientlynote the suspension length of each cord must be same.2) Allow the bar to oscillate about the vertical axis passing through center of gravity and measure periodic time 'T' by knowing time for 20oscillations.3) Repeat the experiment by mounting the weights one equal distancefrom the center.
THEORY
Consider bar AB whose moment of inertia is to be determine issuspended by two parallel strings as shown in figure 2.Let, L = length of each string.m = mass of bar.K = radius of gyration about the vertical axis through G.I = mass moment of inertia about the vertical axis through G.2r = distance between two stringsT = tension in each string
?
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1 Answer

What's the measure of an arc if it's central angle is 35 degrees?


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The circumference of the whole circle is 2 x pi x radius. Since the radius is 1, the circumference will be 2 x pi.

Now a full circle is 360 degrees.

Now we can set up a ratio of 35 degrees is to 360 degree as x is to 2pi.

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Cross-multiply and isolate your variable.

Good luck.

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How to find the length ot the arc ,a circle has a radius of 45cm.


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If angle is in radians , the relation is somewhat simpler,
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A pizza is divided into 8 equal parts. what is the area of one slice if its radius is 6 inches?


Hello and Welcome to FixYa!
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Find the radius of a circle in which a 40o central angle cuts off an arc whose length is 4pi


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