Escape Speed
Trending Questions
A machine gun fires 60 bullets per minute with a velocity of 700m/s . If the mass of each bullet is 50g , calculate the power of gun .
Derive an expression for lateral shift and normal shift. On what factors these depends
A particle on earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy will be
Infinite
Positive
Negative
Zero
- 10−9 m
- 10−6 m
- 100 m
- 10−2 m
- ve
- ve2
- ve√2
- Zero
A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is
R/3
R/2
R/4
R/5
The escape velocity from the earth is about 11kms−1. The escape velocity from a planet having twice the radius and the same mean density as the earth, is
22 km / s
11 km / s
5.5 km / s
15.5 km / s
- the mass of the satellite.
- the mass of the planet.
- all the three parameters.
- the radius of the planet.
- R5
- R10
- R15
- R20
If the earth stops rotating about its axis, then the magnitude of gravity
Will not change at the poles
All of the above
Increases everywhere on the surface of earth
Will increase only at the poles
A space-ship is put into a circular orbit close to Earth's surface. What additional velocity must be imparted to the ship so that it is able to escape the gravitational pull of Earth(approximately)? (R=6400km, g=9.8 ms2)
11.2 km/s
3.3 km/s
6.8 km/s
9.3 km/s
- 14 mgR
- 12 mgR
- mgR
- 13 mgR