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Physics 7B
Exit Handout
DLM 11
FNTs
7.17
. Two asteroids collide headon and stick together.
Before the collision, asteroid A (mass
1,000 kg) moved at 100 m/s, and asteroid B (mass 2,000 kg) moved at 80 m/s in the opposite
direction.
Use momentum conservation (make a complete Momentum Chart) to find the velocity of
the asteroids after the collision.
7.27
. Two asteroids identical to those in FNT 1 collide at right angles and stick together; i.e, their
initial velocities were perpendicular to each other (take A initially moving to the right and B
initially moving up).
Use momentum conservation (make a complete Momentum Chart) to find the velocity
(magnitude and direction withrespectto the velocity asteroid A had before the collision) of
the asteroids after the collision.
7.28
Determine the fractional decrease in total kinetic energy of the two asteroids in the previous
two
FNTs when they collide.
If the average specific heat of the material composing the asteroids is
assumed to be that of ice (2.05 kJ/kg·
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 Winter '09
 WEB
 Physics, Mass, Momentum

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