Gravitation — Page 1 — Tinkutara Math Forum

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Two masses of 3 kg and 6 kg are placed 2 m apart in space. Calculate the gravitational force between them. (Take G=6.673×10^(−11) Nm^2 kg^(−2) )

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Question 215952

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Question 215515

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Question #181679

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A metal sphere has radius R and mass m. A spherical hollow of diameter R is made in this sphere such that its surface passes through the centre of the metal sphere and touches the outside surface of the metal sphere. A unit mass is placed at a distance from the centre of the metal sphere. The gravitational field at that point is (a) ((GM)/R^2 ) (1−(1/(8(1−((2R)/a))^2 ))) (b) ((GM)/a^2 ) (1−(1/(8(1−(R/(2a)))^2 ))) (c) ((GM)/((R+a)^2 )) (1−(1/(8(1−(R/(2a)))^2 ))) (d) ((GM)/((R−a)^2 )) (1−(1/(8(1−((2a)/R))^2 )))

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Question 158941

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Question 138896

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Question 138025

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Question 127708

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fdx(√(25))

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A rocket vertically from the surface of the earth with an initil velocity(v_o ) show that its velocity v at height h is given by v_o ^2 −v^2 =((2gh)/(1+(h/R))) where R is radius of earth and g is the acceleration due to gravity at the earth surface

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Question 72775

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Question 72148

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Question 64452

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with reference to book i am posting some basic question for students. 1)two charged coducting sphere of radius r_(1 ) and r_2 are positvely charged separated at a distance d from each other. force of interaction is F which is correct answer a)F=(1/(4πε))((q_1 q_2 )/d^2 ) b)F>(1/(4πε))((q_1 q_2 )/d^2 ) c)F<(1/(4πε))((q_1 q_2 )/d^2 ) d)none of these 2)same question as 1 but one is +ve q_1 and another is −ve q_2 then which option is correct a)F=F_(columb) b)F>F_(columb) c)F<F_(columb) d)none of these pls give answer with explanatiin..

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Question 56005

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Question 55967

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Question 55748

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Question 53720

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Question 45206

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Question 34988

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two sphere with 10 cm radious and 1 kg mass and distence between this two is 1 m .after what time they will touch each other?

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an elevator of mass 250kg is carrying 3 person whose masses 60kg, 80kg, 100kg and the force exacted by the motion is 5000N. a) With what acceleration will the elevator ascend b) Starting from rest,how far will it go in 5s. (acceleration to gravity G=9.8ms^(−2) ).

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Question 28044

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Question 27939

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Question 27717

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Question 27492

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If a planet is suddenly stopped in its orbit, supposed to be circular, then it would fall into the sun in a time (T/(4(√2))), where T is the time period of revolution. Prove this.

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Question 27287

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Question 27283

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Question 27074

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Two balls, each of radius R, equal mass and density are placed in contact, then the force of gravitation between them is proportional to (1) F ∝ (1/R^2 ) (2) F ∝ R (3) F ∝ R^4 (4) F ∝ (1/R)

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For a geosynchronous satellite of mass m moving in a circular orbit around the earth at a constant speed v and an altitude h above the earth surface.Show the velocity v=(((GM_e )/(R_e +h)))^(1/2) . If the satellite above is synchronous how fast is it moving through space,taking the period to be 24hrs and M_e =mass of the satellite and is equal to 5.98×10^(24) kg