You are running a race due north at 7 miles per hour. The person behind you is running at 8 miles per hour and is catching you. 12.From your perspective (you are the reference point) what is the velocity of the second runner?
13. From the second runner’s perspective (he is the reference point) what is your velocity?

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.