Physics
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump? (Take g = 10 ms^−2 ).
30
Oct
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump? (Take g = 10 ms^−2 ). [...]
A molecule in a gas container hits a horizontal wall with speed 200 m s^−1 and angle 30 degree with the normal, and rebounds with the same speed. Is momentum conserved in the collision ? Is the collision elastic or inelastic ?
30
Oct
A molecule in a gas container hits a horizontal wall with speed 200 m s^−1 and angle 30 degree with the normal, and rebounds with the same speed. Is momentum conserved in the collision ? Is the collision elastic or inelastic ? A molecule in a gas container hits a horizontal wall with speed 200 [...]
A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey? What is the work done by the resistive force in the entire journey, if its speed on reaching the ground is 10 ms^–1?
30
Oct
A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational [...]
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a motorist follows a track that turns to his left by an angle of 60° after every 500 m. Starting from a given turn ,
A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height ,
it attains its maximum (terminal) speed ,
On an open ground ,
sixth and eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case. ,
specify the displacement of the motorist at the third ,
An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster the electron or the proton? Obtain the ratio of their speeds. (electron mass = 9.1×10^−31 kg, proton mass = 1.67×10^−27 kg,1eV = 1.6×10^−19 J)
30
Oct
An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster the electron or the proton? Obtain the ratio of their speeds. (electron mass = 9.1×10^−31 kg, proton mass = 1.67×10^−27 kg,1eV = 1.6×10^−19 J) 1eV = [...]
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1eV = 1.6×10^−19 J) ,
An electron and a proton are detected in a cosmic ray experiment ,
and the second with 100 keV. Which is faster the electron or the proton? Obtain the ratio of their speeds. (electron mass = 9.1×10^−31 kg ,
proton mass = 1.67×10^−27 kg ,
the first with kinetic energy 10 keV ,
A body constrained to move along the z-axis of a coordinate system is subject to a constant force F given by F = – i ^ + 2 j ^ + 3 k ^ N where i ^ , j ^, k ^ are unit vectors along the x, y and z-axis of the system respectively. What is the work done by this force in moving the body a distance of 4 m along the z-axis ?
30
Oct
A body constrained to move along the z-axis of a coordinate system is subject to a constant force F given by F = – i ^ + 2 j ^ + 3 k ^ N where i ^ , j ^, k ^ are unit vectors along the x, y and z-axis of the system [...]
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A body constrained to move along the z-axis of a coordinate system is subject to a constant force F given by F = - i ^ + 2 j ^ + 3 k ^ N where i ^ ,
j ^ ,
k ^ are unit vectors along the x- ,
y- and z-axis of the system respectively. What is the work done by this force in moving the body a distance of 4 m along the z-axis ? ,
A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to
30
Oct
A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to October 30, 2020 Category: Chapter 5 - Work, Energy and Power [...]
A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
30
Oct
A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to October 30, 2020 Category: Chapter 5 - [...]
The potential energy function for a particle executing linear simple harmonic motion is given by V(x) = kx 2 /2, where k is the force constant of the oscillator. For k = 0.5 Nm^−1 , the graph of V(x) versus x is shown in Fig. Show that a particle of total energy 1 J moving under this potential must turn back when it reaches x = ± 2 m.
30
Oct
The potential energy function for a particle executing linear simple harmonic motion is given by V(x) = kx 2 /2, where k is the force constant of the oscillator. For k = 0.5 Nm^−1 , the graph of V(x) versus x is shown in Fig. Show that a particle of total energy 1 J moving [...]
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the graph of V(x) versus x is shown in Fig. Show that a particle of total energy 1 J moving under this potential must turn back when it reaches x = ± 2 m. ,
The potential energy function for a particle executing linear simple harmonic motion is given by V(x) = kx 2 /2 ,
where k is the force constant of the oscillator. For k = 0.5 Nm^−1 ,
Given below are examples of some potential energy functions in one dimension. Mark the total energy of the particle is indicated by a cross on the energy axis. In each case, specify the regions, if any, in which the particle cannot be found for the given energy. Also, indicate the minimum total energy the particle must have in each case. Think of simple physical contexts for which these potential energy shapes are relevant.
30
Oct
Given below are examples of some potential energy functions in one dimension. Mark the total energy of the particle is indicated by a cross on the energy axis. In each case, specify the regions, if any, in which the particle cannot be found for the given energy. Also, indicate the minimum total energy the particle [...]
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Given below are examples of some potential energy functions in one dimension. Mark the total energy of the particle is indicated by a cross on the energy axis. In each case ,
if any ,
in which the particle cannot be found for the given energy. Also ,
indicate the minimum total energy the particle must have in each case. Think of simple physical contexts for which these potential energy shapes are relevant. ,
specify the regions ,
A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the (a) work done by the applied force in 10 s. (b) work done by friction in 10 s, (c) work done by the net force on the body in 10 s, (d) change in kinetic energy of the body in 10 s, and interpret your results.
30
Oct
A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the (a) work done by the applied force in 10 s. (b) work done by friction in 10 s, (c) work done by [...]
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a motorist follows a track that turns to his left by an angle of 60° after every 500 m. Starting from a given turn ,
On an open ground ,
sixth and eighth turn. Compare the magnitude of the displacement with the total path length covered by the motorist in each case. ,
specify the displacement of the motorist at the third ,