a person starts at a postion of 25 meters and finishes at a position of 2 meters. the trip takes 4.5 seconds. what is the person's average velocity? what is the person's average speed?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

How does an observation about an object differ from an inference about that object

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?