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Which will hurt more?

Name: Anonymous 2007-05-26 18:49 ID:ahCu2vnP

getting hit by a ball moving at a constant speed V

or getting hit by the same ball with speed V which was accelerating all the way to the point of impact.

Name: Anonymous 2007-05-26 19:15 ID:PZO7hcgw

how close are you to the ball

Name: Anonymous 2007-05-26 19:15 ID:PZO7hcgw

>>1
and whats the rate of acceleration and whats the velocity

Name: Anonymous 2007-05-26 19:30 ID:waMX1vTZ

If the force accelerating the ball continues to act on the ball after impact, then it will be more painful. Otherwise they are equivalent.

Name: Anonymous 2007-05-26 19:47 ID:7zr9MqQ9

what would hurt more, something with greater velocity or momentum?

Name: Anonymous 2007-05-26 19:56 ID:fLqOk6lt

>>5
Momentum you nigger.  I would rather have a paper ball hit me in the face at a velocity of 10m/s than a bowling ball at a speed of 5m/s

Name: Anonymous 2007-05-26 21:29 ID:Heaven

>>6
I'd rather get hit with a bowling ball moving at 5m/s than a bullet moving at 500m/s.

Name: Anonymous 2007-05-26 21:37 ID:e77zK1Nf

>>1

The two balls would feel exactly the same, given that the velocity (V) was the same at the moment of impact.

Name: Anonymous 2007-05-26 21:45 ID:WIgy9EZD

>>7
The bullet doesn't harm you by blunt force as the bowling ball does. If the bowling ball hit in the same area as the bullet, I'd be looking for a way to take neither.

Name: Anonymous 2007-05-26 22:37 ID:Heaven

>>9
There is no difference, when discussing from a physics point of view, between "blunt" and "sharp" forces.

The idea that a sharp object can do more damage with less momentum is just a colloquial expression of the point my post was making: that pressure is the deciding factor, not momentum.

Name: Anonymous 2007-05-27 4:01 ID:qgAVwoSF

If we assume that the amount of pain caused by impact is proportional to the ball's momentum at the time of impact, then there is no difference. (Unless, as >>4 pointed out, the accelerating force in the second case continues to act on the ball after impact.)

Name: 4tran 2007-05-29 18:13 ID:B+QOkLt3

>>10
Yes, pressure (and sensitivity of target) is the final deciding factor, but it is dependant on things like momentum, size of object, elasticity of object, and elasticity of target

Basically, >>4 is right.

Name: Anonymous 2007-06-03 6:12 ID:DYqWB6DO

Trying to bump out my post. Please ignore this reply.

Name: Anonymous 2007-06-03 8:35 ID:1pNgtkEf

Divide by zero. Oh shi-

Name: Anonymous 2009-03-18 2:50

I wants lots and lots of some delectable pot!

Marijuana MUST be legalized.
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