Pre-lab exercise A glider collides with another glider of equal mass, initially

Question

Pre-lab exercise

A glider collides with another glider of equal mass, initially at rest. Which of the statements are true?

T/F Momentum is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first.
T/F Kinetic energy is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first.
T/F Momentum is conserved if after the collision both gliders move with one-half the velocity of the initial velocity of the first.
T/F Kinetic energy is conserved if after the collision the two gliders move with one-half the velocity of the initial velocity of the first.

Pre-lab exercise The lab asks you to design and carry out measurements that will allow you to determine the momentum, K = 1/2mv^2 of gliders on an air-track before and after the gliders collide. A glider collides with another glider of equal mass, initially at rest. Which of the statements are true? T/F Momentum is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first. T/F Kinetic energy is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first. T/F Momentum is conserved if after the collision both gliders move with one-half the velocity of the initial velocity of the first. T/F Kinetic energy is conserved if after the collision the two gliders move with one-half the velocity of the initial velocity of the first. P = mv , and kinetic energy,

Explanation / Answer

True      Momentum is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first.

as the inital momentum , pi = mv

final momentum , pf = mv

True        Kinetic energy is conserved if the first glider comes to rest while the second glider moves away with the same initial velocity of the first.

the kinectic energy is same before and after the collision

True      Momentum is conserved if after the collision both gliders move with one-half the velocity of the initial velocity of the first.

as the inital momentum , pi = mv

final momentum , pf = mv/2 + mv/2

final momentum , pf = mv

False       Kinetic energy is conserved if after the collision the two gliders move with one-half the velocity of the initial velocity of the first.

KInetic energy after the collision is less than the initial collision

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