Sahay Sir > Question Answers > where R is the radus of the earth and is equal to 6.4×108m. (earth's mass=6×1024kg
Estimate whether it takes more energy to get a satellite upto 1600km above the earth than to put in orbit there. Earth’s radius is 6400km. Does your answer remain same for height 3200km or for height 4800km?
27
Aug
Estimate whether it takes more energy to get a satellite upto 1600km above the earth than to put in orbit there. Earth’s radius is 6400km. Does your answer remain same for height 3200km or for height 4800km? Calculate the velocity with which a body must be thrown vertically from the surface of the earth so [...]
Distance between the centres of two stars is 10a. The masses of these stars are M and 16M and their radii a and 2a respectively. A body of mass m is fired straight from the surface of the larger star towards the smaller star. What should be its minimum initial speed to reach the surface of the smaller star? Obtain the expression in terms of G,Mand a.
27
Aug
Distance between the centres of two stars is 10a. The masses of these stars are M and 16M and their radii a and 2a respectively. A body of mass m is fired straight from the surface of the larger star towards the smaller star. What should be its minimum initial speed to reach the surface [...]
Calculate the velocity with which a body must be thrown vertically from the surface of the earth so that it may reach a height of 10 R, where R is the radius of the earth and is equal to 6.4 × 10^8 m. (earth’s mass=6 × 10^24 kg, gravitational constant
27
Aug
Calculate the velocity with which a body must be thrown vertically from the surface of the earth so that it may reach a height of 10 R, where R is the radius of the earth and is equal to 6.4 × 10^8 m. (earth’s mass=6 × 10^24 kg, gravitational constant Calculate the velocity with which [...]