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March 1, 2015

March 1, 2015

Posted by **Sandi** on Wednesday, November 24, 2010 at 9:22pm.

(a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocity of the cars be immediately after the collision?

magnitude:

direction ° (counterclockwise from due east)

(b) What percentage of the initial kinetic energy will be lost in the collision?

- Physics -
**drwls**, Thursday, November 25, 2010 at 9:38amUse conservation of momentum to get the final velocity and direction.

With the final velocity known for both cars, you can compute the kinetic energy loss, and express it as a percentage of the initial KE.

Be sure to convert km/h speeds to m/s.

The car weights (in N) should be converted to masses (in kg) when computing momentum, by dividing by g, but the g will cancel out anyway.

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