the second equation
2006-06-25 02:59:58
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answer #1
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answered by Frankie 3
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Force =ma
Momentum =mv
Kinetic Energy =1/2mv^2
2013-11-13 11:33:17
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answer #2
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answered by EL 2
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24
2016-03-16 22:43:20
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answer #3
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answered by ? 4
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Since
f=ma
for a mass m accelerating at a, then assuming an ideal system, we can set the impact force as,
f=m(dv/dt)
for a time interval dt.
For example, a 1 kg mass moving at 500 m/s that hits a 'perfect' steel wall where it uniformly decelerates from 500 m/s to 0 m/s in .02 seconds, has an approximate impact force of 25000 N. Thus, a body which decelerates more quickly has a greater effective impact than one which decelerates more slowly.
2006-06-25 13:14:59
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answer #4
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answered by James E 4
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This Site Might Help You.
RE:
F=1/2mv2 or F=mv2?
Which is the correct equation for contact force, such as a Karate blow...
2015-08-17 02:25:03
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answer #5
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answered by Anonymous
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Differential equation for force F is:
F = d(m * v) / dt
If the mass is a constant and using the definition of acceleration a as the change in velocity with time, the second law reduces to the more familiar product of a mass and an acceleration:
F = m * a
Since acceleration is a change in velocity with a change in time t, we can also write this equation in the third form shown on the slide:
F = m * (v1 - v0) / (t1 - t0)
2006-06-25 03:01:58
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answer #6
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answered by hmc121667 3
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F= m*a, E= 1/2mv2 You may want to think of energy as the ability to do work i.e. Force X Distance. If you're asking about a Karate blow, it would seem you want the second equation.
For instance, the energy a bullet imparts upon impact may be measured in ft-lbs.
2006-06-25 04:35:28
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answer #7
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answered by tom d 2
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Neither is right. 1/2* mv^2 is an expression for energy. mv^2 is an expression for momentum. I"m guessing that all you're looking for is F=ma, where F=force, m=mass, a=acceleration.
2006-06-26 14:16:51
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answer #8
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answered by Rachel P 2
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neither. its E=1/2 mv2
2006-06-26 02:39:44
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answer #9
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answered by Anonymous
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F refers force; ½ mvv or mvv refers energy.
Therefore both equations are wrong. The force x displacement gives the total work done or kinetic energy in this case; it is equal to ½ mvv and not mvv.
2006-06-25 03:54:36
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answer #10
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answered by Pearlsawme 7
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force(kinetic energy in this case)=1/2mass*velocity
hope that helps
2006-06-25 03:07:25
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answer #11
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answered by jasmeet_bond 2
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