Question

Two parts:

a) An X1=20 kg mass, moving with an initial velocity v_x,i,1=5m/s collides elastically in one-dimension with an X2=30 kg mass, moving with an initial velocity v_x,i,2=7m/s. Determine the final velocities of the two masses, after the collision (remember to keep track of positive vs. negative velocities!). Verify your answer using conservation of KE.

b) (the inverse of the inelastic collision problem, and similar to the Hunter Thompson problem from class): An 20 kg mass, on the ground, fires 20% of its initial mass at an angle of 30 degrees wrt horizontal. Find the velocity of the remaining (recoil) fragment. Which components of momentum are conserved?

Answer 1

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