seatbelts.
it takes less energy to maintain momentum than to acheive it.
Momentum
because they slow down the momentum of stuff
That would probably depend on the specific situation; there are several equations that involve momentum. Two important equations are: 1) Conservation of momentum: m2 = m1 (i.e., total momentum after some event, such as an impact, is the same as total momentum before the event) 2) The definition of momentum: p = mv (momentum, which is usually written as "p", is mass times velocity) cw: Impulse (Force X time) is equal to the change in momentum.
You didn't supply enough information to solve this problem. Two formulae are important to solve problems with momentum: (1) the definition of momentum: momentum = mass x velocity. (2) the total momentum (sum of individual momenta) before and after the collision must be the same.
because it provides you the acrossing momentum of H20
No. An object has momentum only if it is in motion..There are two kinds of momentum: linear momentum(or translational momentum), and angular momentum (or rotational momentum)..Linear momentum is a vector quantity and is calculated as mass x velocity (p = mv). Therefore, if an object's velocity is zero, then it has no linear momentum, but if an object is in motion, then it does have linear momentum..VERY IMPORTANT NOTE: Velocity, and therefore linear momentum, is always relative to the frame of reference. For a more complete discussion about velocity, see the related answer, referenced below, entitled 'How to Find Velocity'..Angular momentum is a pseudovector quantity that describes the momentum of an object that is spinning or rotating in place. An object has angular momentum only when it is spinning, or rotating about an axis. When an object is not spinning or rotating, then it does not have angular momentum..It is possible for an object to have only linear momentum, only angular momentum, or both angular and linear momentum. Note that this discussion falls apart in quantum mechanics, so we are only discussing classical physics - that is, every day observable objects, and not light particles (photons), electrons, or other quantum particles..All objects do have inertia, which is a resistance to a change in its momentum.
An important relationship between impulse and momentum derived from Newton's second law, which shows that the impulse of force is equal to the change in momentum that it produces.Scientifically speaking there is a relationship between those two because they both aren't moving at all.
When momentum is conserved, the initial momentum is equal to the final momentum.
Use this formula:Final momentum = (initial momentum) + (change in momentum)
what is the definition for momentum