1. The problem statement, all variables and given/known data A student standing on a stationary skateboard tosses a textbook, mt = 1.05 kg, to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 104 kg and the book leaves his hand at a velocity of 2.25 m/s at and angle of 22 degrees with respect to the horizontal. Randomized Variables mt = 1.05 kg mc = 104 kg Vb = 2.25 m/s θ = 22 degrees. what is an expression for the magnitude of the velocity the student has, Vs, after throwing the book? 2. Relevant equations 3. The attempt at a solution I thought that the momentum would be equal and opposite, so I set: mt(vb)=mc(v) solved for v, and got .023 I feel as if I am working this terribly wrong.