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Physics
Three particles of masses
, and 2 kg are located the vertices of an equilateral triangle of side a. The x, y coordinates of the centre of mass are
Three particles of masses
, and 2 kg are located the vertices of an equilateral triangle of side a. The x, y coordinates of the centre of mass are
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A small body slides down a smooth uneven surface from a height H, which eventually emerges into a circular loop of radius R(<H) what should be the value of H, so the that force on the body at A is
times its weight?

A small body slides down a smooth uneven surface from a height H, which eventually emerges into a circular loop of radius R(<H) what should be the value of H, so the that force on the body at A is
times its weight?

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A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assuming the total energy of the ball-Earth system remains constant. What is the difference of tension in string at bottom and top during circular motion 
A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assuming the total energy of the ball-Earth system remains constant. What is the difference of tension in string at bottom and top during circular motion 
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Physics
A particle moves from rest at A on the surface of a smooth circular cylinder of radius r as shown. At B it leaves the cylinder. The equation relating
is

A particle moves from rest at A on the surface of a smooth circular cylinder of radius r as shown. At B it leaves the cylinder. The equation relating
is

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Physics
Three identical particles each of mass 1kg are placed with their centres on a straight line. Their centres are marked A,B and C respectively. The distance of centre of mass of the system from A is
Three identical particles each of mass 1kg are placed with their centres on a straight line. Their centres are marked A,B and C respectively. The distance of centre of mass of the system from A is
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Physics
A homogeneous plate P Q R S T is as shown in figure. The centre of mass of plate lies at midpoint A of segment QT. Then the ratio of is


A homogeneous plate P Q R S T is as shown in figure. The centre of mass of plate lies at midpoint A of segment QT. Then the ratio of is


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A small block slides with velocity
on the horizontal frictionless surface as shown in the fig. The block leaves the surface at point C The angle
in the figure is:

A small block slides with velocity
on the horizontal frictionless surface as shown in the fig. The block leaves the surface at point C The angle
in the figure is:

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Physics
A weightless rod of length 2l carries two equal masses ‘m’, one tied at lower end A and the other at the middle of the rod at B. The rod can rotate in vertical plane about a fixed horizontal axis passing through C. The rod is released from rest in horizontal position. The speed of the mass B at the instant rod, become vertical is:

A weightless rod of length 2l carries two equal masses ‘m’, one tied at lower end A and the other at the middle of the rod at B. The rod can rotate in vertical plane about a fixed horizontal axis passing through C. The rod is released from rest in horizontal position. The speed of the mass B at the instant rod, become vertical is:

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A stone of mass 1 kg tied to a light inextensible string of length
is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the string is 4 and if g is taken to be 10 m / sec2, the speed of the stone at the highest point of the circle is
A stone of mass 1 kg tied to a light inextensible string of length
is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the string is 4 and if g is taken to be 10 m / sec2, the speed of the stone at the highest point of the circle is
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Physics
Three identical spheres each of radius R are placed touching each other on a horizontal table as shown in figure. The co-ordinates of centre of mass are:

Three identical spheres each of radius R are placed touching each other on a horizontal table as shown in figure. The co-ordinates of centre of mass are:

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