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Results tagged with momentum
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user 6982
In introductory mechanics, the momentum of a particle is its mass times its velocity. In electrodynamics, the momentum of a field is proportional to the cross-product of the electric field with the magnetic field. In special relativity, momentum is generalized to four-momentum.
0
votes
Kinetic energy absorbing in order to avoid damages?
In the movies that are shown here, the translational kinetic energy is passed on to a big rotating cylinder in the form of rotational kinetic energy. (The second movie is the clearest with that respec …
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vote
Conservation of Linear Momentum at the point of collision
During the collision, particle 1 will exert a force on particle 2. Let's call this force $F_{12}(t)$. Now, at the same time, particle 2 will exert a force on particle to, $F_{21}(t)$. According to New …
- 5,070
3
votes
Accepted
Same momentum, different mass
You're right about the stopping time, if you continuously apply a constant force, this will indeed be true.
The stopping distance will probably not be the same, as the pingpong-ball is moving much fa …
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3
votes
Accepted
When I move my arm forward in vacuum, will my body move backward?
Yes.
There are only internal forces of your body. Without external forces, the center of mass of your body cannot change position. As your center of mass did not move, the main body should move in th …
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