Suppose that two gliders are launched toward each other. As it happens there is

Question

Suppose that two gliders are launched toward each other. As it happens there is noticeable friction between each of the gliders and the track. They collide and each rebounds back in the direction from which it came. The initial and final velocities for each glider are measured 20cm away from the spot of the collision.

[1] Would it be possible to find the after collision momentum to be the same as the before collision momentum? Yes or No

Would it be possible to find the after collision kinetic energy to be the same as the before collision kinetic energy? No or Yes

Explanation / Answer

1) No,

because of the friction the bodies slow down. so momentum is decreased.

2) No,

Beacuse, Friction does negative work on the blocks.so, kinetic enrgy of the blocks decreases.

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