You weigh 500n, what stops you from falling to the center of the earth

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Answer fast for how does the force exerted by two magnets change as the magnets are moved farther apart? the magnetic force increases. the magnetic force decreases. the magnetic force stays the same.