Chapter 8: A 0.150kg glider is moving to the right (+x) on a frictionless, horizontal air track with a speed of 0.80m/s. It has an elastic collision with a 0.300kg glider moving to the left (-x) with a speed of 2.20m/s.
a.) What is the initial momentum of each glider? Express the momentum in terms of unit vectors.
b.) Use the relative velocity formula to find v2f in terms of v1f.
c.) Use the relative velocity result to solve conservation of momentum to find the velocity (magnitude and direction) of each glider after the collision.
d.) Show that kinetic energy is conserved.

Question

Chapter 8: A 0.150kg glider is moving to the right (+x) on a frictionless, horizontal air track with a speed of 0.80m/s.  It has an elastic collision with a 0.300kg glider moving to the left (-x) with a speed of 2.20m/s.
a.) What is the initial momentum of each glider?  Express the momentum in terms of unit vectors.
b.) Use the relative velocity formula to find v2f in terms of v1f.
c.) Use the relative velocity result to solve conservation of momentum to find the velocity (magnitude and direction) of each glider after the collision.  
d.) Show that kinetic energy is conserved.

anonymous · Answer

The momentums are p=mv, for the first one .15kg*.8m/s, then you just plug in these values into your relative velocity formula found in your text book.