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When a body moves along a semicircle total angle subtended by it at centre of circle is?
Wiki User
∙ 10y ago
Pie/2
=22/7/2
Angle in radians =
Total length of the arc/radius of the circle
Anonymous
Anonymous
At the center of the circle is 180 °, 22/7
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What is a figure that has one straight line?
A semicircle is an example of a figure with one straight line. It is a circle that has been split along the diameter.
How many times does the radius of a circle fit along the circumference of the circle?
It is: circumference/radius = 2*pi
How many miles does one degree equal along a great circle?
60
Why does a circle have infinite lines of symmetry?
Because the distance from one point at the circumference through the center to another point at the circumference is always the same, at an infinite set of coordinates along the circle (anywhere, relative to the size of the circle, and always providing an axis which perfectly dissects the circle).
How do you draw a 260 degree angle?
Assuming you have a 180o protractor:A full circle is 360o, so the obtuse angle that makes a full circle with the 260o reflex angle is 360o - 260o = 100o.So measure an angle of 100o and draw it, but mark the reflex angle with a small arc:Draw one arm of the angle;Put the centre (cross-hairs) of the protractor at one end of this line;Rotate the protractor about its centre until one of the zero lines is along the line already drawn.Mark 100o using the scale that has 0o on the lineremove the protractor and draw the line from the end of the line where the centre was to this mark.Draw a small arc around the "outside" of the angle (from one line to the other, near the point where the lines meet) to show it is the reflex angle that has been drawn.
A rod of length L has total charge Q distributed uniformly along its length it's then bent in the shape of a semicircle find the magnitude of the electric field at the centre of semicircle?
http://www.physicsforums.com/showthread.php?t=209089
What is a figure that has one straight line?
A semicircle is an example of a figure with one straight line. It is a circle that has been split along the diameter.
The direct distance between city A and city B?
Is along the arc of the Great Circle which is an imaginary circle with its centre at the centre of the earth and the two cities on its circumference. This is why the direct routes between some cities go over the pole rather than follow latitudes.
What is a line that intercects a circle at one point?
Generally, the equation of a circle is (x-a)2 + (y-b)2 = r2where (a,b) is the centre of a circle, and r is the radius.So you can use this equation along with a general line equation, y=mx+c, or using the gradient and finding the equation of the normal.
What is a point that is the same distance from each point?
It's the middle point of line. Hardly! How far would that be from a point 3/4 way along the line? Try centre of a circle, or of a sphere.
What shape is created when a circle is folded along the diameter?
When a circle is folded along its diameter, it creates two congruent halves or semicircles.
Why radian has no dimension?
The simplest explanation is that a radian is defined as the distance an angle would subtend along the circumference of a circle of radius "r" divided by the radius "r." If we call the subtended arc "a," then both "r" and "a" are measured in length units, which of course cancel out when the ratio "a" over "r" is taken.The easiest way to understand this is probably through an example. Take an angle of 30 degrees. If we construct a unit circle (radius = 1 unit) centered at the vertex of the angle, then we know the circumference of the circle is 2(pi)r = 6.283 units. We also know that the circumference of the circle is 360 degrees by definition, so a 30 degree angle subtends 30/360, or 8.3 percent of the circumference of 6.283 units, or 0.524 units. Thus, the angle in radians is the length of the subtended arc, 0.524 units, over the length of the radius, 1 unit, or 0.524 units/1 unit = 0.524 (with the units dimension canceling out).Since by definition, circumference = 2(pi)(r) = 360 degrees, it is easy to see that an arc of "r" units (that is one radian) = 360/(2(pi)) = 57.3 degrees and that there are 2(pi), or 6.28 radians in 360 degrees. If one radian = 57.3 degrees, then the 30 degree example above should equate to 30/57.3 = 0.524 radians, just as was shown.Bottom line is that an angle in radians defines a given subtended arc distance for a circle of any radius measured in any units, as long as it is centered at the vertex of the angle. If a circle of radius 57 hoozits is centered at the vertex, then an arc of length "57 times the angle in radians" hoozits is subtended. Similarly, if a circle of radius 23 cm is centered at the vertex, then an arc of length "23 times the angle in radians" cm subtended. In either case, the subtended angle in degrees is the angle in radians times 360/((2)(pi)).
Does the acceleration of a body moving in circular path remain constant?
If the speed of the object doesn't change, then yes.
What is the shortest most direct route between any two points on te surface of the earth?
Assuming the earth to be a perfect sphere, the shortest distance is an arc of the great circle. The two places and the centre of the earth define a plane. The great circle is the circle formed by the intersection of that plane and the surface of the earth. The shortest route between the two places is the smaller of the two arcs along that circle.
What does horizontal line on a displacement-time graph represent?
That the body, whose motion is being plotted is not moving radially. It can be moving along a circle with the origin as the centre at any speed but that does not show up in a displacement-time graph.
How does an ellipse compare with a perfect circle?
The question is a strange one as the answer depends on the context in which the question is asked. Graphically speaking: A line forming a perfect circle means that given a set point as the centre of the circle, the line will always be the exact same distance from the centre of the circle at any point along the line. An Ellipse on the other hand is a smooth closed curve that is symmetrical about its centre point, or by way of example, two points on the ellipse which are exactly opposite each other across the centre of the ellipse will each be exactly the same distance from the centre. Mathematically speaking, the difference can be defined by the equations (formulae) of each: A perfect Circle will have the equation: (x-a)2 + (y-b)2 = r2 for a circle with: a centre in Cartesian co-ordinates of (a,b) a radius of r An Ellipse will have the equation: (x2/a2) + (y2/b2) = 1 for an ellipse with: a maximum value in the X-axis of 'a' (+a or -a) a maximum value in the Y-axis of 'b' (+b or -b) The essential difference in these equations can be seen if we consider an ellipse and a circle each with a centre of (0,0) in Cartesian co-ordinates. the equation for a circle would become: X2 + Y2 = r we can manipulate this equation by dividing both sides by 'r' to give X2/r + Y2/r = 1 the only difference now between the equation of the ellipse and this equation of a circle is that instead of allowing the 'r' X2/r to be different to the 'r' in Y2/r as in the case of an ellipse, both are kept the same.
What is a great circle route?
It is the path along a circle that cuts the earth into two equal hemispheres.
