What is the final velocity of an object that starts from rest and travels for 5 seconds at an acceleration of 4.3 m/s2?

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon