A 1.5x10³ kilogram car is driven at a constant speed of 12 meters per second counterclockwise around a horizontal circular track having a radius of 50 meters, as represented below. Which vector best represents the direction of the velocity of the car when it is at the position shown?

see earlier

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.