NCERT Exemplar Class 11
A ball is dropped and its displacement versus time graph is as shown (Displacement x from ground and all quantities are positive upwards). (a) Plot qualitatively velocity versus time graph. (b) Plot qualitatively acceleration versus time graph.
30
Oct
A ball is dropped and its displacement versus time graph is as shown (Displacement x from ground and all quantities are positive upwards). (a) Plot qualitatively velocity versus time graph. (b) Plot qualitatively acceleration versus time graph. Among the four graphs T) can vanish for a suitably chosen T. Which one is it? there is [...]
An object falling through a fluid is observed to have acceleration given by a=g−bv where `g= gravitational acceleration and (b) is constant. After a long time of release. It is observed to fall with constant speed. What must be the value of constant speed ?
30
Oct
An object falling through a fluid is observed to have acceleration given by a=g−bv where `g= gravitational acceleration and (b) is constant. After a long time of release. It is observed to fall with constant speed. What must be the value of constant speed ? Among the four graphs T) can vanish for a suitably [...]
Give example of a motion where x >0, v 0 at a particular instant
30
Oct
Give example of a motion where x >0, v 0 at a particular instant Give example of a motion where x >0 v 0 at a particular instant October 30, 2020 Category: Chapter 2 - Motion in a Straight Line , NCERT Exemplar Class 11 , Physics ,
Give examples of a one-dimensional motion where (a) the particle moving along positive x-direction comes to rest periodically and moves forward. (b) the particle moving along positive x-direction comes to rest periodically and moves backward.
30
Oct
Give examples of a one-dimensional motion where (a) the particle moving along positive x-direction comes to rest periodically and moves forward. (b) the particle moving along positive x-direction comes to rest periodically and moves backward. Among the four graphs T) can vanish for a suitably chosen T. Which one is it? there is only one [...]
Refer to the graph in figure. Match the following.
30
Oct
Refer to the graph in figure. Match the following. Refer to the graph in figure. Match the following. October 30, 2020 Category: Chapter 2 - Motion in a Straight Line , NCERT Exemplar Class 11 , Physics ,
The variation of quantity A with quantity B. plotted in the fig. Describes the motion of a particle in a straight line. (a) Quantity B may represent time. (b) Quantity A is velocity if motion is uniform. (c) Quantity A is displacement if motion is uniform (d) Quantity A is velocity if motion is uniformly accelerated.
30
Oct
The variation of quantity A with quantity B. plotted in the fig. Describes the motion of a particle in a straight line. (a) Quantity B may represent time. (b) Quantity A is velocity if motion is uniform. (c) Quantity A is displacement if motion is uniform (d) Quantity A is velocity if motion is uniformly [...]
The displacement of a particle is moving by x =(t−2)^2 where x is in metres and t in second. The distance covered by the particle in first 4 seconds is.
30
Oct
The displacement of a particle is moving by x =(t−2)^2 where x is in metres and t in second. The distance covered by the particle in first 4 seconds is. The displacement of a particle is moving by x =(t−2)^2 where x is in metres and t in second. The distance covered by the particle [...]
A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct?
30
Oct
A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct? A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and [...]
Among the four graphs, there is only one graph for which average velocity over the time interval (0, T) can vanish for a suitably chosen T. Which one is it?
30
Oct
Among the four graphs, there is only one graph for which average velocity over the time interval (0, T) can vanish for a suitably chosen T. Which one is it? Among the four graphs T) can vanish for a suitably chosen T. Which one is it? there is only one graph for which average velocity [...]
A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m 1000 times. Assume that the potential energy lost each time she lowers the mass is dissipated. (a) How much work does she do against the gravitational force? (b) Fat supplies 3.8 ×10^7 J of energy per kilogram which is converted to mechanical energy with a 20% efficiency rate. How much fat will the dieter use up?
30
Oct
A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m 1000 times. Assume that the potential energy lost each time she lowers the mass is dissipated. (a) How much work does she do against the gravitational force? (b) Fat supplies 3.8 ×10^7 J of [...]
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A molecule in a gas container hits a horizontal wall with speed 200 m s^−1 and angle 30 degree with the normal ,
A person trying to lose weight (dieter) lifts a 10 kg mass ,
and rebounds with the same speed. Is momentum conserved in the collision ? Is the collision elastic or inelastic ? ,
one thousand times ,