NCERT Exemplar Class 11
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 ,
A bullet fired at an angle of 30^o with the horizontal hits the ground 3.0 km away. By adjusting its angle of projection, can one hope to hit a target 5.0 km away? Assume the muzzle speed to be fixed, and neglect air resistance.
30
Oct
A bullet fired at an angle of 30^o with the horizontal hits the ground 3.0 km away. By adjusting its angle of projection, can one hope to hit a target 5.0 km away? Assume the muzzle speed to be fixed, and neglect air resistance. A bullet fired at an angle of 30^o with the horizontal [...]
A particle starts from the origin at t = 0 s with a velocity of 10.0 j ^ m/s and moves in the x-y plane with a constant acceleration of (8.0 i^ + 2.0 j ^ ) m/s^2 . (a) At what time is the x- coordinate of the particle 16 m? What is the y-coordinate of the particle at that time? (b)What is the speed of the particle at the time ?
30
Oct
A particle starts from the origin at t = 0 s with a velocity of 10.0 j ^ m/s and moves in the x-y plane with a constant acceleration of (8.0 i^ + 2.0 j ^ ) m/s^2 . (a) At what time is the x- coordinate of the particle 16 m? What is the [...]
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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 ,
The position of a particle is given by r = 3.0 t i ^ − 2.0 t^2 j^ + 4.0 k^m where t is in seconds and the coefficients have the proper units for r to be in metres (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?
30
Oct
The position of a particle is given by r = 3.0 t i ^ − 2.0 t^2 j^ + 4.0 k^m where t is in seconds and the coefficients have the proper units for r to be in metres (a) Find the v and a of the particle? (b) What is the magnitude and direction [...]
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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 ,
An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity.
30
Oct
An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity. An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of 900 km/h. Compare its centripetal acceleration with the acceleration due to gravity. October [...]
A passenger arriving in a new town wishes to go from the station to a hotel located 10 km away on a straight road from the station. A dishonest cabman takes him along a circuitous path 23 km long and reaches the hotel in 28 min. What is (a) the average speed of the taxi. (b) the magnitude of average velocity. Are the two equal?
30
Oct
A passenger arriving in a new town wishes to go from the station to a hotel located 10 km away on a straight road from the station. A dishonest cabman takes him along a circuitous path 23 km long and reaches the hotel in 28 min. What is (a) the average speed of the taxi. [...]
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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 ,
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ?
30
Oct
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ? A stone tied to the end of a string 80 cm long [...]