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# JEE Free Doubts and Solutions

## What is the centre of mass of pyramid? Explain briefly with examples

Asked by polyrelation 21st October 2019, 10:11 PM

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## A man has constructed a toy as shown in fig. If the density of the material of the sphere is 12 times that of the cone then determine the position of the centre of mass. [Centre of mass of a cone of height h is at height of h4 from its base.]

Asked by rushabhjain.a 21st October 2019, 10:03 PM

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## The figure shows a uniform square plate from which four identical squares at the corners will be removed. (a) Where is the center of mass of the plate originally? Where is it after the removal of (b) square 1; (c) squares 1 and 2; (d) squares 1 and 3; (e) squares 1, 2, and 3; (f) all four squares? Explain briefly

Asked by rushabh1234 21st October 2019, 9:49 PM

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## As we know there is no gravity when we are in centre of earth but why the particles around us in eraths centre doesn't try to pull us .

Asked by Kaushalharsh386 21st October 2019, 12:19 AM

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## Sir i have a boubt that the centripetal force due to the ritatuon of earth is effecting the acceleration due to gravity , but the centripetal force is different for different masses , so the gravity is also different for diffrendi mass ? Help me.

Asked by Kaushalharsh386 19th October 2019, 12:59 AM

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## A thin non conducting disc of radius R is rotating clockwisee with an angular velocity w about its central axis,which is perpendicular to its plane.Both its surface carry positive charges of uniform surface density.Half the disc in a region  of a uniform ,unidirectional magnetic field B parallel to the plane of the disc as shown in figure.Then  A)Net torque on the disc is zero B)Net torque vector on the disc is directed leftwards C)Net torque vector on the disc is directed rightwards D)Net torque vector on the disc is parallel to B :Sir plzz..tell me how and which one (Right or Left ,and why )Flemming rule is being applied and its whole explanation please

Asked by vishakhachandan026 18th October 2019, 12:13 AM

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## A particle is projected vertically upward with velocity 20m/s at the same instant another particle B is dropped from a tower of height 100m time at which B meet with A. ans is not 5sec

Asked by ashutosharnold1998 17th October 2019, 1:19 PM

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## What is the centre of mass of sector of the circle. Explain with diagram

Asked by rushabh1234 17th October 2019, 6:05 AM

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## Circles

Asked by shettyatul17 16th October 2019, 8:39 PM

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### IIT JEE - Main - Physics

Asked by Tanmmygarg6 15th October 2019, 9:37 AM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:20 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:19 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:18 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:11 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:09 PM

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## Sir pls solve this question.

Asked by rsudipto 15th December 2018, 6:13 PM

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## 2nd and 3rd

Asked by StarBoy 15th December 2018, 2:25 PM

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## Sir in this question how is the inverse fn derived. Pls explain in details.

Asked by rsudipto 15th December 2018, 8:55 AM

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## Sir pls solve this question.

Asked by rsudipto 14th December 2018, 9:52 AM

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## Sir pls solve this question.

Asked by rsudipto 14th December 2018, 9:51 AM