Which force requires contact? A. The force exerted by air as an object moves through it
B. The force produced by interactions between electronically charged objects
C. The forced produced by interactions between magnetic objects
D. The force of attraction between two masses

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u. s. legal proceeding.)

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?