Physics
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 ,
The blades of a windmill sweep out a circle of area A. (a) If the wind flows at a velocity v perpendicular to the circle, then the mass of the air of density ρ passing through it in time t is ?
30
Oct
The blades of a windmill sweep out a circle of area A. (a) If the wind flows at a velocity v perpendicular to the circle, then the mass of the air of density ρ passing through it in time t is ? The blades of a windmill sweep out a circle of area A. (a) [...]
A particle of mass 0.5 kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force during its displacement from x=0 to x=2m?
30
Oct
A particle of mass 0.5 kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the net force during its displacement from x=0 to x=2m? A particle of mass 0.5 kg travels in a straight line with velocity v=ax^3/2 where a=5m^−1/2s^−1. What is the work done by the [...]
The bob A of a simple pendulum is released from a horizontal position A as shown in in figure. If the length of the pendulum is 1.5m , what is the speed with which the bob arrives at the lowermost point B, given that it dissipates 5% of its initial energy against air resistance ?
30
Oct
The bob A of a simple pendulum is released from a horizontal position A as shown in in figure. If the length of the pendulum is 1.5m , what is the speed with which the bob arrives at the lowermost point B, given that it dissipates 5% of its initial energy against air resistance ? [...]
Two identical ball bearing in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with a speed V. If the collision is elastic, which of the following (figure above) is a possible result after collision?
30
Oct
Two identical ball bearing in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with a speed V. If the collision is elastic, which of the following (figure above) is a possible result after collision? a motorist follows a track that [...]
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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 ,