Looking for the notes of 1st year Physics chapter 5 Circular Motion. Here we've got uploaded the first Year Physics Notes Chapter 4 - 11th Class Notes pdf download or examine online Topics notes, Short and lengthy questions, and workout questions.
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| 1st Year Physics Notes Chapter 5 - 11th Class Notes pdf |
Physics Notes Chapter 5 - 11th Class Notes pdf
Q. What is Centrifugal pressure?
Centrifugal pressure
Consider a stone tied to a string transferring in a circle. The vital centripetal pressure acts at the stone thru the string that maintains it to transport in a circle. According to Newton's 1/3 regulation of movement
There exists a response to this centripetal pressure. The centripetal response that draws the string outward is on occasion known as the centrifugal pressure.
Banking of avenue
When an automobile takes a flip, centripetal pressure is wanted to hold it in its curved song The friction among the tires and the street gives the vital centripetal pressure The automobile could skid if the pressure of friction among the tires and the street isn't always enough sufficient especially while the roads are moist This hassle is solved via way of means of banking of curved roads Banking of an avenue manner that the outer fringe of an avenue is raised Imagine an automobile on a curved avenue.
Banking reasons an element of cars weight to offer the vital centripetal pressure even as taking a flip Thus banking of roads prevents skidding of automobile and as a consequence makes the using safe
Q. Define and give an explanation for the instant of inertia?
Answer
Moment of Inertia (Rotational Inertia)
The tendency of a frame to hold its kingdom of relaxation or kingdom of uniform angular movement is known as the second of inertia
OR
It is described because the manufactured from the mass of particle and rectangular of its perpendicular distance from the axis of rotation
It is denoted via way of means of I and is given via way of means of Mr.
OR
The sum of merchandise of hundreds of the debris in a frame and the rectangular in their respective distance from the axis of rotation is known as the second of inertia
Rotational Kinetic Energy
The electricity possessed via way of means of the frame because of its rotation approximately an axis is known as rotational kinetic electricity
Rotational Kinetic Energy
The electricity possessed via way of means of the frame because of its rotation approximately an axis is known as rotational kinetic electricity
Expression for rotational K.E
Suppose the frame is spinning or rotating approximately an axis with regular speed To discover the overall KE of the spinning frame, we bear in mind that it's far composed of small portions of hundreds m.mUse of rotational K.E.
Rotational KE. is placed to realistic use via way of means of flywheels, which are vital elements of many engines. A flywheel shops electricity among the electricity strokes of the pistons, so that electricity is uniformly disbursed over the entire revolution of the crankshaft and hence, the rotation stays smooth
Q. Explain the phenomenon of weightlessness in satellites and gravity unfastened gadgets.
Answer
Weightlessness in Satellite and Gravity Free System
When a satellite tv for pc is falling freely in the area below the motion of pressure of enchantment of earth, the solar or a way famous person then the entirety in the satellite tv for pc may be in the kingdom of weightlessness To display that the earth's satellite tv for pc is a freely falling object, we bear in mind the conduct of projectile thrown parallel to the horizontal floor of the earth withinside the absence of air friction If the projectile is thrown successively large speeds, then at some stage in its unfastened fall to the earth, the curvature of the route decreases with growing horizontal speeds it the projectile is thrown speedy sufficient parallel to the earth The curvature of the route will healthy the curvature of the earth.
There isn't any pressure on the gap craft in a gravity unfastened area If the spaceship is to live withinside the orbit for an extended time, this weightlessness creates quite a few troubles for astronauts gift withinside the spaceship. To conquer this difficulty, synthetic gravity is created withinside the spaceship to carry out the experiments typically via way of means of astronauts.
The astronaut then is pressed in the direction of the outer nm and exerts pressure at the ground of the spaceship in a great deal the equal manner as at the earth.
Q. What are geo-desk bound orbits and geostationary satellite tv for pc? Find the orbital radius of geo desk-bound satellites?
Answer
Geostationary orbits
The orbit wherein the length of revolution of satellite tv for pc is precisely the same as the length of rotation of earth approximately its axis, is known as geostationary orbit
Geostationary satellites
The satellite tv for pc which entire its one decision across the earth in 24 hours is known as geostationary satellite tv for pc
An exciting and beneficial instance of satellite tv for pc movement is the geosynchronous or geostationary satellite tv for pc This kind of satellite tv is the only one whose orbital movement will become the same as the length of rotation of the earth. So the satellite tv for pc stays constant over the equal factor at the equator because the earth spins on its axis Such satellites are utilized in communique gadget climate remark and different army uses
Q. Write a quick notice on communique satellite tv for pc?
Answer
Communication satellites
A communique satellite tv for pc gadgets may be installed via way of means of setting numerous geostationary satellite tv for pc in orbit over special factors at the floor of earth this type of satellite tv. We cover 120" of longitude So the entire of the populated earth's floor may be included via way of means of 3 efficiently placed satellites. Use of waves for communique.
Microwaves are utilized in communique communities due to the fact they journey in a slim beam, indirectly line, and may skip without problems thru the environment of the earth.
Solar cells offer the electricity to extend and re-transmit the sign About two hundred earth stations transmit and acquire the alerts thru satellite tv for pc from different international locations.
Satellite Organization (INTELSAT)
The biggest satellite tv for pc gadget, controlled via way of means of 126 international locations is known as INTELSAT VI INTELSAT manner global telecommunication satellite tv for pc enterprise it really works on the microwave frequencies of four 6 eleven and 14 GHz and has the capability of 30 000 manner phone circuit plus 3 TV channels.
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