Question Answers

A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of 30 with the horizontal. How far from the throwing point will the ball be at the A boy playing on the roof of a 10 m high building throws a [...]

The friction of the air causes vertical retardation equal to one-tenth of the acceleration due to gravity (take g = 10 m/s^2). Find the decrease in the time of flight. The friction of the air causes vertical retardation equal to one-tenth of the acceleration due to gravity (take g = 10 m/s^2). Find the decrease [...]

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. 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 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 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 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 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 ,

A particle is thrown with velocity u at an angle alpha from the horizontal. Another particle is thrown with the same velocity at an angle alpha from the vertical. What will be the ratio A particle is thrown with velocity u at an angle alpha from the horizontal. Another particle is thrown with the same [...]

A body starts from the origin with an acceleration of 6 m/s^2 along the x-axis and 8 m/s^2 along the y-axis. Find its distance from the origin after 4 s. A body starts from the origin with an acceleration of 6 m/s^2 along the x-axis and 8 m/s^2 along the y-axis. Find its distance from [...]