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Hidden momentum, field momentum, and electromagnetic impulse
American Journal of Physics, 2009Electromagnetic fields carry energy, momentum, and angular momentum. The momentum density, ϵ0(E×B), accounts (among other things) for the pressure of light. But even static fields can carry momentum, and this would appear to contradict a general theorem that the total momentum of a closed system is zero if its center of energy is at rest. In such cases,
David Babson +3 more
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Cotton buds, momentum, and impulse
The Physics Teacher, 2000Here is a simple experiment demonstrating impulse and momentum that was picked up from a Japanese presenter at a physics teacher conference held in Cebu City. We have not been able to trace the experiment farther and have never seen it in print. After student-author Nuñez demonstrated it during an exam on conducting demonstrations, we converted the ...
Ed van den Berg +3 more
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1993
Linear momentum is a physical quantity that provides another approach to the behaviour of objects in motion. It is a vector quantity obtained by multiplying the mass of an object by its velocity. It therefore has the unit kg m s−1. Its direction is the same as that of the velocity of the object.
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Linear momentum is a physical quantity that provides another approach to the behaviour of objects in motion. It is a vector quantity obtained by multiplying the mass of an object by its velocity. It therefore has the unit kg m s−1. Its direction is the same as that of the velocity of the object.
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1984
The work in this chapter is again based on Newton’s laws, which are first used to establish the principle of conservation of momentum for systems of particles. We also study how to predict the consequences of a sharp blow occurring, for example, when two particles collide.
Tony Bridgeman +2 more
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The work in this chapter is again based on Newton’s laws, which are first used to establish the principle of conservation of momentum for systems of particles. We also study how to predict the consequences of a sharp blow occurring, for example, when two particles collide.
Tony Bridgeman +2 more
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The electromagnetic impulse pendulum and momentum conservation
Il Nuovo Cimento D, 1986Largely quantitative experiments by Pappas have indicated that the momentum imparted to an electrodynamic impulse pendulum was not balanced by an equal and opposite momentum change of field energy as required by the special theory of relativity. The authors repeated Pappas' experiment using discharge currents from a capacitor bank which contained a ...
P. Graneau, P. N. Graneau
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Momentum, Impulse, and Collisions
2015We demonstrate that the conservation of momentum, \(m \mathbf {v}\), is a result of integrating Newton’s second law over time. If the integral is zero, that is, if the net force is zero, then we find that \(m \mathbf {v}\) does not change. But how can that be useful? Didn’t we already know from Newton’s first law that if the net external force is zero,
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Impulse, Momentum, Work and Energy
1979In this chapter we discuss certain integrals of the equation of motion which can sometimes be used with advantage as alternatives to the basic equation.
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Teaching About Impulse and Momentum
2005This AAPT/PTRA resource book features labs and demos physics teachers can use to give students hands-on opportunities to learn about impulse and momentum. “Make-and-take activities” include AAPT Apparatus Contest winners “An Air Impulse Rocket,” “A Fan Driven Sailcart,” “An Elastic/Inelastic Collision Cart,” and others.
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