Physics-
General
Easy
Question
A wheel of radius 0.4 m can rotated freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung, An angular acceleration of 8 rad- 
is produced in it due to the torque. Then moment inertia of the wheel is 
The correct answer is:
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A rigid uniform rod of mass M and length ' L ' is resting on a smooth horizontal table. Two marbles each of mass ' 
' and travelling with uniform speed ' V ' collide with two ends of the rod simultaneously and inelastically as shown. The marbles get struck to the rod after the collision and continue to move with the rod. If 
and V=L mts/sec, then the time taken by the rod to rotate through
A rigid uniform rod of mass M and length ' L ' is resting on a smooth horizontal table. Two marbles each of mass ' ' and travelling with uniform speed ' V ' collide with two ends of the rod simultaneously and inelastically as shown. The marbles get struck to the rod after the collision and continue to move with the rod. If and V=L mts/sec, then the time taken by the rod to rotate through
physics-General
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A circular disc is rotating about its natural axis with angular velocity of 10 rads-1. A second disc of same mass is joined to it coaxially. If the radius of disc is half of the radius of the first, then they together rotate with an angular velocity of
A circular disc is rotating about its natural axis with angular velocity of 10 rads-1. A second disc of same mass is joined to it coaxially. If the radius of disc is half of the radius of the first, then they together rotate with an angular velocity of
physics-General
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Two blocks of masses 2 kg and 1 kg are tied to the ends of a string which passes over a light frictionless pulley. The masses are held at rest at the same horizontal level and then released. The distance traversed by centre of mass in 2sec is
Two blocks of masses 2 kg and 1 kg are tied to the ends of a string which passes over a light frictionless pulley. The masses are held at rest at the same horizontal level and then released. The distance traversed by centre of mass in 2sec is
physics-General
physics-
Three particles of equal masses are placed at the corners of an equilateral triangle, as shown in fig. Now particle A starts with a velocity 
towards line AB, particle B starts with a velocity 
towards line BC and particle C starts with velocity 
towards line CA. The displacement of C.M. of three particle A, B and C after time "t" will be (given if 
)
Three particles of equal masses are placed at the corners of an equilateral triangle, as shown in fig. Now particle A starts with a velocity towards line AB, particle B starts with a velocity towards line BC and particle C starts with velocity towards line CA. The displacement of C.M. of three particle A, B and C after time "t" will be (given if )
physics-General
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A mass is rest on an inclined plane of mass M which is further resting on a smooth horizontal plane. Now, if the mass starts moving position of C.M. of mass of system will:
A mass is rest on an inclined plane of mass M which is further resting on a smooth horizontal plane. Now, if the mass starts moving position of C.M. of mass of system will:
physics-General
physics-
In a sphere of mass M and radius R, a part of radius R/2 is removed from it according to fig. Centre of mass shifts (x) towards negative x direction, then the value of x in terms of R is :
In a sphere of mass M and radius R, a part of radius R/2 is removed from it according to fig. Centre of mass shifts (x) towards negative x direction, then the value of x in terms of R is :
physics-General
physics-
A wire of uniform cross-section is bent in the shape shown in fig. The co-ordinates of the centre of mass of each side are shown in fig. The co-ordinates of the centre of mass of the system are
A wire of uniform cross-section is bent in the shape shown in fig. The co-ordinates of the centre of mass of each side are shown in fig. The co-ordinates of the centre of mass of the system are
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The figure shows a metallic plate of uniform thickness and density. The value of l in terms of L so that the centre of mass of the system lies at the interface of the triangular and rectangular portion is:
The figure shows a metallic plate of uniform thickness and density. The value of l in terms of L so that the centre of mass of the system lies at the interface of the triangular and rectangular portion is:
physics-General
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Four particles, each of mass m, are placed at the corners of a square of side a shown in Fig. The position vector of the centre of mass is
Four particles, each of mass m, are placed at the corners of a square of side a shown in Fig. The position vector of the centre of mass is
physics-General
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Three masses 2 kg,3 kg and 4 kg are lying at the corners of an equilateral triangle of side l. The (X) coordinates of centre of mass is :
Three masses 2 kg,3 kg and 4 kg are lying at the corners of an equilateral triangle of side l. The (X) coordinates of centre of mass is :
physics-General
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Four cubes of side a each of mass 40 g,20 g,10 g and 20 g are arranged in XY plane as shown in the figure. The coordinates of centre of mass of the combination with respect to point O is
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physics-General
chemistry-
When zeolite is treated with hard water the sodium ions are exchanged with:
When zeolite is treated with hard water the sodium ions are exchanged with:
chemistry-General
chemistry-
Sodium zeolite is ........................
Sodium zeolite is ........................
chemistry-General
chemistry-
Which type of salt is mainly present in sea water?
Which type of salt is mainly present in sea water?
chemistry-General
chemistry-
For the given aqueous reaction which of the statement(s) is (are) true ?
For the given aqueous reaction which of the statement(s) is (are) true ?
chemistry-General
