A body is projected upwards with a velocity of `4 xx 11.2 "km s"^(-1)` from the surface of earth.What will be the velocity of the body when it escapes from the gravitational pull of earth ?

Explanation

To solve the problem of finding the velocity of a body when it escapes from the gravitational pull of the Earth, we will use the principle of conservation of mechanical energy. Here’s a step-by-step solution:

### Step 1: Understand the Problem
We have a body projected upwards with an initial velocity \( v_0 = 4 \times 11.2 \, \text{km/s} \). We need to find its velocity when it escapes Earth's gravitational pull.

### Step 2: Conservation of Mechanical Energy
According to the conservation of mechanical energy, the total mechanical energy (kinetic + potential) at the surface of the Earth will equal the total mechanical energy at an infinite distance from the Earth.

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