Physics-
General
Easy
Question
A pendulum of length 2m lift at P. When it reaches Q, it losses 10% of its total energy due to air resistance. The velocity at Q is
- 6 m/se c
- 1 m/sec
- 2 m/sec
- 8 m/sec
The correct answer is: 6 m/se c
If v is velocity of pendulum at Q
and 10% energy is lost while moving from P to Q
Hence, by applying conservation of between P and Q
Þ
Þ 
Related Questions to study
Physics-
A simple pendulum with a bob of mass ‘m’ oscillates from A to C and back to A such that PB is H. If the acceleration due to gravity is ‘g’, then the velocity of the bob as it passes through B is
A simple pendulum with a bob of mass ‘m’ oscillates from A to C and back to A such that PB is H. If the acceleration due to gravity is ‘g’, then the velocity of the bob as it passes through B is
Physics-General
Physics-
A man measures the period of a simple pendulum inside a stationary lift and finds it to be T sec. If the lift accelerates upwards with an acceleration 
, then the period of the pendulum will be
A man measures the period of a simple pendulum inside a stationary lift and finds it to be T sec. If the lift accelerates upwards with an acceleration , then the period of the pendulum will be
Physics-General
Physics-
The period of oscillation of a simple pendulum of constant length at earth surface is T. Its period inside a mine is
The period of oscillation of a simple pendulum of constant length at earth surface is T. Its period inside a mine is
Physics-General
Physics-
Which of the following is the nm = T graph for a perfectly black body (nm =maximum frequency of radiation)
Which of the following is the nm = T graph for a perfectly black body (nm =maximum frequency of radiation)
Physics-General
Physics-
In the figure, the distribution of energy density of the radiation emitted by a black body at a given temperature is shown. The possible temperature of the black body is
In the figure, the distribution of energy density of the radiation emitted by a black body at a given temperature is shown. The possible temperature of the black body is
Physics-General
Physics-
Radius of a conductor increases uniformly from left end to right end as shown in fig.
Material of the conductor is isotropic and its curved surface is thermally isolated from surrounding. Its ends are maintained at temperatures T1 and T2 (T1 > T2): If, in steady state, heat flow rate is equal to H, then which of the following graphs is correct
Radius of a conductor increases uniformly from left end to right end as shown in fig.
Material of the conductor is isotropic and its curved surface is thermally isolated from surrounding. Its ends are maintained at temperatures T1 and T2 (T1 > T2): If, in steady state, heat flow rate is equal to H, then which of the following graphs is correct
Physics-General
Chemistry-
The IUPAC name of 
The IUPAC name of
Chemistry-General
Chemistry-
The order of stability of the following cabocations 
is
The order of stability of the following cabocations is
Chemistry-General
Chemistry-
IUPAC name of the compound is
IUPAC name of the compound is
Chemistry-General
Chemistry-
The IUPAC name of 
is
The IUPAC name of is
Chemistry-General
Chemistry-
IUPAC name of the compound 
is
IUPAC name of the compound is
Chemistry-General
Chemistry-
The IUPAC name of the given structure 
The IUPAC name of the given structure
Chemistry-General
Chemistry-
The IUPAC name of 
is
The IUPAC name of is
Chemistry-General
Chemistry-
The IUPAC name of the compound 
is
The IUPAC name of the compound is
Chemistry-General
Chemistry-
The IUPAC name of the given structure 
(or) 
The IUPAC name of the given structure (or)
Chemistry-General
