Arihant Physics by D.C Pandey
Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If first car blows horn. of frequency 280 Hz, then the frequency of horn. heard by the driver of second car when line joining the car makes angle of 45 with the roads, will be
19
Sep
Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If first car blows horn. of frequency 280 Hz, then the frequency of horn. heard by the driver of second car when line joining the car makes angle of 45 with the roads, will be [...]
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to B. Calculate the difference in the two frequencies heard by observer.
19
Sep
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to [...]
A source of sound is approaching an observer with speed of 30ms and the observer is approaching the source with a speed 60 ms”. Then the fractional change in the frequency of sound in air (330ms) is
19
Sep
A source of sound is approaching an observer with speed of 30ms and the observer is approaching the source with a speed 60 ms”. Then the fractional change in the frequency of sound in air (330ms) is A source of sound is approaching an observer with speed of 30ms and the observer is approaching the [...]
What impulse need to be given to a body of mass m, released from the surface of earth along a straight tunnel passing through centre of earth, at the centre of earth, to bring it to rest. (Mass of earth M, radius of earth R)
19
Sep
What impulse need to be given to a body of mass m, released from the surface of earth along a straight tunnel passing through centre of earth, at the centre of earth, to bring it to rest. (Mass of earth M, radius of earth R) at the centre of earth radius of earth R) released [...]
What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass of the earth is M.
19
Sep
What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass of the earth is M. What additional velocity must be given to a satellite orbiting around the earth with radius R to become free from earths gravitational field ? Mass [...]
A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of orbit, then its angular momentum would be
19
Sep
A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of orbit, then its angular momentum would be A planet of mass m is in an elliptical orbit about the sun with an orbital period T. If A be the area of [...]
The gravitational potential energy of a body at a distance r from the centre of earth is U. Its weight at a distance 2r from the centre of earth is
19
Sep
The gravitational potential energy of a body at a distance r from the centre of earth is U. Its weight at a distance 2r from the centre of earth is The gravitational potential energy of a body at a distance r from the centre of earth is U. Its weight at a distance 2r from [...]
A planet is revolving round the sun in an elliptical orbit, If v is the velocity of the planet when its position vector from the sun is r, then areal velocity of the planet is
19
Sep
A planet is revolving round the sun in an elliptical orbit, If v is the velocity of the planet when its position vector from the sun is r, then areal velocity of the planet is A planet is revolving round the sun in an elliptical orbit If v is the velocity of the planet when [...]
If orbital velocity of planet is given by v = Ga Mb Rc, then
19
Sep
If orbital velocity of planet is given by v = Ga Mb Rc, then If orbital velocity of planet is given by v = Ga Mb Rc then September 19, 2020 Category: Arihant Physics by D.C Pandey , Chapter 10 - Gravitation , Volume 1 ,
Assume that the acceleration due to gravity on surface of the moon is 0.2 times the acceleration due to gravity on the surface of earth. If Re is the maximum range of a projectile on the earth’s surface, what is the maximum range on the surface of the moon for the same velocity of projection ?
19
Sep
Assume that the acceleration due to gravity on surface of the moon is 0.2 times the acceleration due to gravity on the surface of earth. If Re is the maximum range of a projectile on the earth’s surface, what is the maximum range on the surface of the moon for the same velocity of projection [...]