Astronomers detect a distant meteoroid moving along a straight line that, if extended, would pass at a distance 3RE from the center of the Earth, where RE is the radius of the Earth. What minimum speed must the meteoroid have if the Earth’s gravitation is not to deflect the meteoroid to make it strike the Earth? Ans: sqrt.(GMearth/4RE) MY homework! SO i got it in the right category. I tried, and tried. Not getting anywhere. I WOULD paste what I've done, but what I've done is wrong. Cause I interpreted the Q wrongly. I had my asteroid start to move towards the earth only when it was 3RE distance away; whatmore, I tried doing it via dynamics/kinematics; which was stupid cause the direction of the gravitational force is constantly changing. (it is right?) Please help. Advice or even just small, little hints. Thanks!