two Like parallel forces of 2N and 5N are 21m apart. magnitude, direction and Line of action of the resultant of these forces are ​

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?