Recent questions in Physics

Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy . How much power is generated by the turbine ? $( g = 10\: m/s^2)$

asked Dec 14, 2013 by thanvigandhi_1

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Three forces acting on a body are shown in the figure. To have the resultant force only along the $y$ - direction, the magnitude of the minimum additional force needed is :

asked Dec 14, 2013 by thanvigandhi_1

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Sand is being dropped on a conveyor belt at the rate of M / kg s. The force necessary to keep the belt moving with a constant velocity of $ v\: m/s$ will be :

asked Dec 14, 2013 by thanvigandhi_1

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A particle of mass $m$ is projected with velocity $v$ making an angel of $45^{\circ}$ with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be :

asked Dec 14, 2013 by thanvigandhi_1

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A particle shows distance - time curve as given in the figure. The maximum instantaneous velocity of the particle is around the point :

asked Dec 14, 2013 by thanvigandhi_1

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A particle moves in a straight line with a constant acceleration. It changes its velocity from $ 10 \: ms^{-1} $ to $ 12 \: ms^{-1} $ while passing through a distance 135 m in $t$ second. The value of $t$ is :

asked Dec 14, 2013 by thanvigandhi_1

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The distance travelled by a particle starting from rest and moving with an acceleration $ \large\frac{4}{3}\: ms^{-2}$, in the third second is :

asked Dec 14, 2013 by thanvigandhi_1

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If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be :

asked Dec 14, 2013 by thanvigandhi_1

1 answer

Which two of the following five physical parameters have the same dimensions ?

asked Dec 14, 2013 by thanvigandhi_1

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When a damped spring mass system is forced into oscillations at different frequencies it resonates (amplitude increases and peaks when compared to input amplitude) at its damped natural frequency. For such systems the resonance of acceleration is more when

asked Dec 10, 2013 by meena.p

1 answer

The phase constant in rad of a simple pendulum whose amplitude of oscillation is 2; initial displacement is 1, initial velocity is 4 units/sec, frequency in rad/sec is 6 is:

asked Dec 10, 2013 by meena.p

1 answer

The phase constant in radians of a simple pendulum having an initial displacement of 24 units and having an amplitude of .24 is

asked Dec 10, 2013 by meena.p

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The product of time period in seconds and frequency of oscillation in rad/sec of a simple pendulum of length $l$ suspended inside a rocket moving vertically with an acceleration 'a' just above the earth is:

asked Dec 10, 2013 by meena.p

1 answer

A simple pendulum is suspended inside a truck moving uniformly with a small acceleration of '3b'. Its mean position as an angle in radians with respect to the vertical is

asked Dec 10, 2013 by meena.p

1 answer

If the velocity of a spring mass system which starts from zero is given by $6 \sin(4t)$ then its amplitude of displacement and accelerations are

asked Dec 10, 2013 by meena.p

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If the acceleration of the mass of a spring mass system is equal to $2 \sin 5t,$ the resulting motion is

asked Dec 10, 2013 by meena.p

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The damped natural frequency is higher than natural frequency is a

asked Dec 9, 2013 by meena.p

1 answer

When four similar springs are connected in series to four non identical masses with three of the masses in between the three springs and the other at the end:

asked Dec 9, 2013 by meena.p

1 answer

When three springs are used to suspend a mass what happens to the natural frequency when compared to when each of the spring is used to suspend the same mass:

asked Dec 9, 2013 by meena.p

1 answer

A body has the following combinations of acceleration, position, velocity at one instant while the fourth parameter is its initial position. Which of the following combinations describes $SHM$:

asked Dec 9, 2013 by meena.p

1 answer

How many minimum observations of the acceleration (at various time instants) are required to quantify a simple harmonic motion (form the exact equation describing the displacement as a function of time):

asked Dec 9, 2013 by meena.p

1 answer

The motion of the sea waves when wind is blowing uniformly can be considered as:

asked Dec 9, 2013 by meena.p

1 answer

The mean position and one extreme position of the two different waves represented by $x=23 \sin(2t)$ and $x=5+23 \sin(2t)$ respectively are:

asked Dec 9, 2013 by meena.p

1 answer

The motion of an electric train throughout the day is a:

asked Dec 9, 2013 by meena.p

1 answer

When a damped spring mass system is forced into oscillations at different frequencies it resonates (amplitude increases and peaks when compared to input amplitude) at its damped natural frequency. For such systems the resonance of velocity is more when

asked Dec 9, 2013 by meena.p

1 answer

The phase constant in rad/sec of a simple pendulum whose amplitude of oscillation is 'b', initial displacement is 'y', initial velocity is 'v', frequency in rad/sec is 'w' is

asked Dec 9, 2013 by meena.p

1 answer

The phase constant in radians of a simple pendulum having an initial displacement of 4 units and having an amplitude of 3 is

asked Dec 9, 2013 by meena.p

1 answer

The time period of oscillation in sec of a simple pendulum of length l suspended inside a rocket moving vertically with an acceleration '2a' just above the earth is:

asked Dec 9, 2013 by meena.p

1 answer

A simple pendulum is suspended inside a truck moving uniformly with a small acceleration of $‘2a’.$ Its mean position as an angle in radians with respect to the vertical is

asked Dec 9, 2013 by meena.p

1 answer

If the velocity of a spring mass system which starts from zero is given by $7 \sin(4t)$ then its amplitude of displacement and accelerations are

asked Dec 9, 2013 by meena.p

1 answer

If the acceleration of the mass of a spring mass system is equal to $5 \sin 4t,$ the resulting motion is

asked Dec 9, 2013 by meena.p

1 answer

The damping in a system

asked Dec 9, 2013 by meena.p

1 answer

When three similar springs are connected in series to three non identical masses with two of the masses in between the springs and the other at the end:

asked Dec 9, 2013 by meena.p

1 answer

When four springs are used to suspend a mass what happens to the natural frequency when compared to when each of the spring is used to suspend the same mass:

asked Dec 9, 2013 by meena.p

1 answer

A body starting from rest has the following combinations of acceleration, position, velocity and at one instant while its initial displacement is given as the fourth variable. Which of the following combinations describes $SHM$:

asked Dec 9, 2013 by meena.p

1 answer

How many minimum observations of the velocity (at various time instants) are required to be made to quantify a simple harmonic motion (to form the exact equation describing the displacement as a function of time):

asked Dec 9, 2013 by meena.p

1 answer

The motion of an object is given by $x=23 \sin^2(2-3t).$ This is a

asked Dec 9, 2013 by meena.p

1 answer

The mean position and one extreme position of the two different waves represented by $x=10-20 \sin(8t)$ and $x=12+21sin(3t)$ respectively are:

asked Dec 9, 2013 by meena.p

1 answer

The mean position and one extreme position of the two different waves represented by $x=35 \sin(5t)$ and $x=8+23 \sin(8t)$ respectively are:

asked Dec 9, 2013 by meena.p

1 answer

The motion of stars is a

asked Dec 9, 2013 by meena.p

1 answer

When a damped spring mass system is forced into oscillations at different frequencies it resonates (amplitude increases and peaks when compared to input amplitude) at its damped natural frequency. For such systems for the same input amplitude, the resonance is more when

asked Dec 9, 2013 by meena.p

1 answer

The phase constant, in rad/sec, of a simple pendulum - whose amplitude of oscillation is 'a' initial displacement is 'x', initial velocity is 'v', frequency in rad/sec is 'w' - is equal to:

asked Dec 9, 2013 by meena.p

1 answer

The phase constant in radians of a simple pendulum having an initial displacement of $3.9$ units and having an amplitude of $5.2$ is

asked Dec 9, 2013 by meena.p

1 answer

The frequency of oscillation in rad/sec of a simple pendulum of length l suspended inside a rocket moving vertically with an acceleration 'a' just above the earth is:

asked Dec 9, 2013 by meena.p

1 answer

A simple pendulum is suspended inside a truck moving uniformly with a small acceleration of 'a'. Its mean position as an angle in radians with respect to the vertical is

asked Dec 9, 2013 by meena.p

1 answer

If the velocity of a spring mass system which starts from zero is given by 5 sin(3t) then its amplitude of displacement and accelerations are

asked Dec 9, 2013 by meena.p

1 answer

If the acceleration of the mass of a spring mass system is equal to $2 \sin 2t$, the resulting motion is

asked Dec 9, 2013 by meena.p

1 answer

The damped natural frequency is

asked Dec 9, 2013 by meena.p

1 answer

When two similar springs are connected in series to two non identical masses with one of the masses in between the two springs and the other mass being at the end:

asked Dec 9, 2013 by meena.p

1 answer

When two springs are used to suspend a mass what happens to the natural frequency when compared to when each of the spring is used to suspend the same mass:

asked Dec 9, 2013 by meena.p

1 answer

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