Question

Find an expression for escape velocity?

Answer 1

This is the escape speed - the minimum speed required to escape a planet's gravitational pull.

• To find the escape velocity, apply energy conservation: Ui + Ki = Uf + Kf

• For a planet of mass M and radius R, the potential energy of an object of mass m at the planet's surface is: U= - G m M/R.

Answer 2

Answer:

To find the escape velocity, apply energy conservation: Ui + Ki = Uf + Kf

For a planet of mass M and radius R, the potential energy of an object of mass m at the planet's surface is: U= - G m M/R.

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