Does a rocket really need the escape speed of `11.2 km//s` initially to escape from the Earth?

Is it necessary to give initial speed of 11.2 km/s to a rocket for its separation from the earth ?

The escape velocity from the earth for a rocket is 11.2 km//sec . Ignoring the air resistance, the escape velocity of 10mg grain of sand from the earth will be (in km//sec )

The escape velocity of 10g body from the earth is 11.2 km s^(-1) . Ignoring air resistance, the escape velocity of 10 kg of the iron ball from the earth will be

The escape velocity of 10g body from the earth is 11.2 km s^(-1) . Ignoring air resistance, the escape velocity of 10 kg of the iron ball from the earth will be

The escape velocity of a rocket launched from the surface of the earth

The escape speed for an object from the earth is 11.2 km/s . Arrive at an expression for the escape speed. Does it depend on the mass of the object or not?

What will be the escape speed from, a planet having volume 27 times that of earth and the same mean density as that of the earth? Take escape speed from the earth 11.2 km/s, earth and planet are perfectly sphere)

What will be the escape speed from, a planet having volume 27 times that of earth and the same mean density as that of the earth? Take escape speed from the earth 11.2 km/s, earth and planet are perfectly sphere)