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  1. C

    Momentum/Kinetic Energy Problem

    Homework Statement A car moving with an initial speed v collides with a second stationary car that is 52.9 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 31.8 percent of the original speed. Calculate the final speed of the...
  2. C

    Calculating work done using vectors

    Homework Statement A single constant force F = (2.84i + 4.60j) N acts on a 4.12 kg particle. Calculate the work done by this force if the particle moves from the origin to the point having the vector position r = (1.52i - 2.55j) m. Homework Equations W=FD The Attempt at a...