16 Mar '08 21:59

You land on an earth size planet where the gravity is the same as earth so the density is the same as earth.

Now the shuttle can take off because it pulls about 2and1/2 G's .

But something horrible is happening. The planet for some unknown reason is shrinking, maybe eventually it will be a black hole and there is no escape. They have engineered the shuttle to get 5 G's of accel but for half the time. What is the smallest the planet can shrink, the density increasing all the time, and they still get to take off? We can call the planet 13,000 Km in diameter to start, about the same as earth.

Now the shuttle can take off because it pulls about 2and1/2 G's .

But something horrible is happening. The planet for some unknown reason is shrinking, maybe eventually it will be a black hole and there is no escape. They have engineered the shuttle to get 5 G's of accel but for half the time. What is the smallest the planet can shrink, the density increasing all the time, and they still get to take off? We can call the planet 13,000 Km in diameter to start, about the same as earth.