A spaceship is projected vertically upward from the Earth's surface with an initial speed of 7.51 km/s, but unfortunately does not have a great enough speed to escape Earth's gravity. What maximum height does the spaceship reach (in m)? Ignore air resistance.

Respuesta :

Answer:

[tex]h=2.87\times 10^6\ m[/tex]

Explanation:

Given that,

Initial speed of the spaceship, u = 7.51 km/s = 7510 m/s

At maximum height, final speed of the spaceship, v = 0

Let h is the maximum height reached by the spaceship. Using third equation of motion to find it as :

[tex]v^2-u^2=2gh[/tex]

[tex]u^2=2gh[/tex]  

[tex]h=\dfrac{u^2}{2g}[/tex]

[tex]h=\dfrac{(7510)^2}{2\times 9.81}[/tex]              

[tex]h=2.87\times 10^6\ m[/tex]

So, the maximum height reached by the spaceship is [tex]2.87\times 10^6\ m[/tex]. Hence, this is the required solution.