Physics-
General
Easy
Question
A massless rod of length 1 m is hanged from the ceiling at one end and the other end is connected to the weight W. Cross-sectional area of the wire is 
With reference to the above graph, Young’s modulus of the material of the wire 
is
The correct answer is:
Related Questions to study
physics-
The position vector 
and linear momentum
are 
and 
the angular momentum vector is
perpendicular to
The position vector and linear momentum are and the angular momentum vector is perpendicular to
physics-General
physics-
If none of the vectors 
and 
are zero and if 
and 
the value of 
is
If none of the vectors and are zero and if and the value of is
physics-General
physics-
Assertion: A massless rope thrown over a frictionless pulley has a ladder with a mass of m on one its ends and a counter balancing mass M on its other end. If a man climbs with some velocity then centre of mass of the system (man, ladder and balancing mass) moving upward.
Reason: Net force on the system is in upward direction is zero.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion: A massless rope thrown over a frictionless pulley has a ladder with a mass of m on one its ends and a counter balancing mass M on its other end. If a man climbs with some velocity then centre of mass of the system (man, ladder and balancing mass) moving upward.
Reason: Net force on the system is in upward direction is zero.
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
Assertion: If the moment of inertia of a non-uniform ring of mass M and radius R is known about an AA', then we can calculate the moment of inertia about BB' (C is the geometrical centre of ring).
Reason: 
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
Assertion: If the moment of inertia of a non-uniform ring of mass M and radius R is known about an AA', then we can calculate the moment of inertia about BB' (C is the geometrical centre of ring).
Reason:
A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but Reason is not correct explanation of the Assertion.
C) If Assertion is true but Reason is false.
D) If Assertion is false but Reason is true.
physics-General
physics-
A uniform rod of length l is pivoted at point A. It is struck by a horizontal force which delivers an impulse J at a distance x from point A as shown in figure, if impulse delivered by pivot is zero hat initially then x is
A uniform rod of length l is pivoted at point A. It is struck by a horizontal force which delivers an impulse J at a distance x from point A as shown in figure, if impulse delivered by pivot is zero hat initially then x is
physics-General
physics-
Three masses 
and 
are suspended at the end of a spring a shown and are in equilibrium. When the 
mass is removed, the system oscillates with a period of 3 seconds, when the 
mass is also removed, it will oscillate with a period of
Three masses and are suspended at the end of a spring a shown and are in equilibrium. When the mass is removed, the system oscillates with a period of 3 seconds, when the mass is also removed, it will oscillate with a period of
physics-General
physics-
A wooden block performs SHM on a frictionless surface with frequency, 
The block carries a change 
on its surface. If now a uniform electric field 
is switched-on as shown, then SHM of the block will be
A wooden block performs SHM on a frictionless surface with frequency, The block carries a change on its surface. If now a uniform electric field is switched-on as shown, then SHM of the block will be
physics-General
physics-
Two identical springs of constant 
are connected in series and parallel as shown in figure. A mass 
is suspended from them. The ratio of their frequencies of vertical oscillations will be
Two identical springs of constant are connected in series and parallel as shown in figure. A mass is suspended from them. The ratio of their frequencies of vertical oscillations will be
physics-General
physics-
Lissajous figure shown in figure. Corresponds to which one of the following
Lissajous figure shown in figure. Corresponds to which one of the following
physics-General
physics-
A cylinder of mass M and radius R lying on a rough horizontal surface for which coefficient of friction is 
is pushed by applying a horizontal force P at distance R/2 from the centre as shown in figure. The frictional force acting at the contact is
A cylinder of mass M and radius R lying on a rough horizontal surface for which coefficient of friction is is pushed by applying a horizontal force P at distance R/2 from the centre as shown in figure. The frictional force acting at the contact is
physics-General
physics-
A block having equilateral triangular cross-section of side a and mass m is placed on a rough inclined surface, so that it remains in equilibrium as shown in figure. The torque of normal force acting on the block about its centre of mass is
A block having equilateral triangular cross-section of side a and mass m is placed on a rough inclined surface, so that it remains in equilibrium as shown in figure. The torque of normal force acting on the block about its centre of mass is
physics-General
physics-
A uniform cylinder of radius R is spinned to an angular velocity 
and then placed on an inclined for which coefficient of friction is
. (
is the angle of incline). The centre of mass of the cylinder will remain stationary for time
A uniform cylinder of radius R is spinned to an angular velocity and then placed on an inclined for which coefficient of friction is. ( is the angle of incline). The centre of mass of the cylinder will remain stationary for time
physics-General
physics-
A smooth rod of length 
is kept inside a trolley at an angle as shown in the figure. What should be the acceleration a of the trolley so that the rod remains in equilibrium with respect to it?
A smooth rod of length is kept inside a trolley at an angle as shown in the figure. What should be the acceleration a of the trolley so that the rod remains in equilibrium with respect to it?
physics-General
physics-
A lamina of mass M is in shape of a quarter of circle of radius R as shown in figure. The moment of inertia of this lamina about axis AB is
A lamina of mass M is in shape of a quarter of circle of radius R as shown in figure. The moment of inertia of this lamina about axis AB is
physics-General
physics-
The plank in the figure moves a distance 100 mm to the right while the centre of mass of the sphere of radius 150 mm moves a distance 75 mm to the left. The angular displacement of the sphere (in radian) is (there is no slipping anywhere)
The plank in the figure moves a distance 100 mm to the right while the centre of mass of the sphere of radius 150 mm moves a distance 75 mm to the left. The angular displacement of the sphere (in radian) is (there is no slipping anywhere)
physics-General
