Physics-
General
Easy
Question
A thin uniform rod of mass M and length L hangs from a frictionless pivot and is connected at the bottom by a spring to the wall as shown. The spring constant is K. The system is allowed to oscillate by pressing end B of the rod and releasing. The period of oscillation will be
The correct answer is:
If 
is small 
Related Questions to study
Physics-
A semi cylindrical shell with negligible thickness oscillates without slipping on a horizontal surface.
The time period of small oscillations is (Hint : centre of mass of the shell lies at 
below the centre)
A semi cylindrical shell with negligible thickness oscillates without slipping on a horizontal surface.
The time period of small oscillations is (Hint : centre of mass of the shell lies at below the centre)
Physics-General
Physics-
Initially spring is compressed by distance 
from equilibrium position. At this compression block is given velocity 
so that compression in the spring increases and block start SHM (Spring constant K). Equation of motion of the block is
Initially spring is compressed by distance from equilibrium position. At this compression block is given velocity so that compression in the spring increases and block start SHM (Spring constant K). Equation of motion of the block is
Physics-General
Physics-
A ball is suspended by a thread of length l at the point O on the wall, forming a small angle 
with the vertical (figure) Then the thread with the ball was deviated through 2 and set free. Assuming the collision of the ball against the wall to be perfectly elastic, find the oscillation period of such a pendulum.
A ball is suspended by a thread of length l at the point O on the wall, forming a small angle with the vertical (figure) Then the thread with the ball was deviated through 2 and set free. Assuming the collision of the ball against the wall to be perfectly elastic, find the oscillation period of such a pendulum.
Physics-General
Physics-
A mass m attached to a spring A has a frequency of 3 Hz and a spring B has a frequency of 4 Hz. When both the springs are connected as shown, find the frequency (in Hz) of oscillation.
A mass m attached to a spring A has a frequency of 3 Hz and a spring B has a frequency of 4 Hz. When both the springs are connected as shown, find the frequency (in Hz) of oscillation.
Physics-General
Physics-
If we go deep into earth, time period of simple pendulum will:
If we go deep into earth, time period of simple pendulum will:
Physics-General
General
"The sky appears blue. This is due to atmospheric refraction.”
Identify whether the above statement is true or false.
"The sky appears blue. This is due to atmospheric refraction.”
Identify whether the above statement is true or false.
GeneralGeneral
Physics-
A car is moving with a speed of 100 kmh-1 . if the mass of the car is 950 kg, then its kinetic energy is
A car is moving with a speed of 100 kmh-1 . if the mass of the car is 950 kg, then its kinetic energy is
Physics-General
Chemistry-
Acetic acid is a weak electrolyte because:
Acetic acid is a weak electrolyte because:
Chemistry-General
Physics-
A body is projected horizontally from the top of a high tower with a speed of 20 m/s. After 4 sec the displacement of the body is (take g=10m/s2)
A body is projected horizontally from the top of a high tower with a speed of 20 m/s. After 4 sec the displacement of the body is (take g=10m/s2)
Physics-General
Chemistry-
Consider the reaction:
The rate equation for this reaction is : 
Which of these mechanisms is/are consistent with this rate equation ?
Consider the reaction: The rate equation for this reaction is : Which of these mechanisms is/are consistent with this rate equation ?
Chemistry-General
Physics-
Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at one point and moved with velocities V1 = 1 m/s and V2 = 4 m/s horizontally in opposite directions. The distance between the particles at the moment when their velocity vectors become mutually perpendicular is (g=10m/s2)
Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at one point and moved with velocities V1 = 1 m/s and V2 = 4 m/s horizontally in opposite directions. The distance between the particles at the moment when their velocity vectors become mutually perpendicular is (g=10m/s2)
Physics-General
Chemistry-
An endothermic reaction with high activation energy for the forward reaction is given by the diagram:
An endothermic reaction with high activation energy for the forward reaction is given by the diagram:
Chemistry-General
Chemistry-
Graph between concentration of the product' x' and time' t' for 
is given ahead:
The graph between 
and time wil1 be of the type:
Graph between concentration of the product' x' and time' t' for is given ahead:
The graph between and time wil1 be of the type:
Chemistry-General
Chemistry-
Following is the graph between 
and time t for second order reaction. 
hence rate at the start of reaction will be:
Following is the graph between and time t for second order reaction. hence rate at the start of reaction will be:
Chemistry-General
Chemistry-
Following is the graph between log tll2 and log a (a = initial concentration) for a given
reaction at 
e. Hence, order is:
Following is the graph between log tll2 and log a (a = initial concentration) for a given
reaction at e. Hence, order is:
Chemistry-General
