Recent content by Jfex

  1. J

    Momentum before and after the collision and relative velocities.

    Sorry I'm not to sure how that will help because now I'm left with two variables; the final velocity of the final velocity of the ball? 0.2*20 + 20000*25 = 0.2*vfinal + 20000*vfinal I'm not sure what you mean?
  2. J

    Momentum before and after the collision and relative velocities.

    Homework Statement If the truck was not stationary but was moving horizontally towards the ball at 25 ms-1, what would be the speed of the ball, relative to the ground, after the collision (in ms-1)? Mass of ball = 0.2 kg Mass of truck = 20 tonnes Initial velocity of ball = 20 ms-1 (to the...