Physics-
General
Easy
Question
The bob of a simple pendulum is displaced from its equilibrium position O to a position Q which is at height h above O and the bob is then released. Assuming the mass of the bob to be m and time period of oscillations to be 2.0 sec, the tension in the string when the bob passes through O is
The correct answer is:
Tension in the string when bob passes through lowest point 
(
v = rw)
putting 
and 
we get 
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Two simple pendulums of length 5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed .... oscillations.
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Physics-General
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Physics-General
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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
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Physics-General
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A ball is suspended by a thread of length l at the point O on the wall, forming a small angle 
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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
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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.
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If we go deep into earth, time period of simple pendulum will:
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Physics-General
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Identify whether the above statement is true or false.
GeneralGeneral
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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
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Physics-General
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Acetic acid is a weak electrolyte because:
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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)
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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)
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Physics-General
