Two billiard balls move in a straight line with the following equations of motion: Xi = -6.0 m + (0.5 m/s) t
X2 = 10.8 m + (-2.5 m/s) t
At what time do the billiard balls collide (at the same final position)?

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving

Atrain flies at a speed of 350 miles per hour how far will it travel in 3 hours