Question

A small utility car is pulled along a straight section of railroad tracks by a rope. When the ropepulls the car for 10 seconds the car reaches a final speed, after starting from rest, of 8m/s. Now the situation is modified slightly so that the rope pulls, just as hard as in the previous casebut at a 45 degree angle. After 10 seconds what would the final speed of the car be if we could ignore friction and other effects and why?

Answer 1

10