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What are escape velocity? - Science and Technology 1

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प्रश्न

What is escape velocity? 

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उत्तर

The minimum velocity required to project an object to escape from the Earth's gravitational pull is known as escape velocity. It is given as: vesc = `sqrt((2"GM")/"R")`

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अध्याय 1: Gravitation - Exercises [पृष्ठ १४]

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बालभारती Science and Technology 1 [English] 10 Standard SSC Maharashtra State Board
अध्याय 1 Gravitation
Exercises | Q 2.2 | पृष्ठ १४

संबंधित प्रश्न

What do you mean by acceleration due to gravity?


Which force is responsible for the moon revolving round the earth ?


When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.


Explain what is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.


What do you mean by the term free fall ?


What do you understand by the term 'acceleration due to gravity of earth' ?


The values of g at six distances A, B, C, D, E and F from the surface of the earth are found to be 3.08 m/s2, 9.23 m/s2, 0.57 m/s2, 7.34 m/s2, 0.30 m/s2 and 1.49 m/s2, respectively.
(a) Arrange these values of g according to the increasing distances from the surface of the earth (keeping the value of g nearest to the surface of the earth first)
(b) If the value of distance F be 10000 km from the surface of the earth, state whether this distance is deep . inside the earth or high up in the sky. Give reason for your answer.


A pressure of 10 Pa acts on an area of 3.0 m2. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?


The total energy of an object falling freely towards the ground ______.


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A car is moving with a uniform velocity 30 ms-1. It is stopped in 2 s by applying a force of 1500 N through its brakes. Calculate the following values :  The retardation produced in car.


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An object falling freely from rest reaches ground in 2 s. If acceleration due to gravity is 9.8 m s-2, then the velocity of object on reaching the ground will be 


Free fall of an object does not depend on the mass of the object.


Write scientific reason.

The value of gravitational acceleration (g) decreases as we go deep inside the earth.


Write scientific reason.

The value of gravitational acceleration (g) is taken to be -g when studying the motion of an object thrown upwards in a straight line.


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(Given: G = 6.67 × 10-11 Nm2/kg2)


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