On a test flight, a rocket with mass 400 kg blasts off from the surface of the earth. the rocket engines apply a constant upward force f until the rocket reaches a height of 100 m and then they shut off. if the rocket is to reach a maximum height of 400 m above the surface of the earth, what value of f is required? assume the change in the rocket's mass is negligible.

F=11.76 kN

Explanation:

Given

mass of rocket

Force F is applied up to a height of 100 m then it is shut off

final velocity v up to which force is applied is given by

After this rocket continues to move to a maximum height under the action of gravity

using

thus Force is

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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