Suppose an object is moving in a straight line at 50 miles/hr. According to Newton's first law of motion, the object will ________.
1) continue to move in the same way forever, no matter what happens.
2) continue to move in the same way until it is acted upon by a force.
3) eventually slow down and come to a stop.
4) continue to move in a straight line forever if it is in space, but slow and stop otherwise.
5) continually slow down but never quite come to a complete stop.