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Simply because physicists discovered that it is a product that is conserved.
In collisions of two objects for example, if you add up the momentum before the collision the momentum will be the same after the collision.
Note that momentum is not something that has a concrete reality.
A rock sitting on the ground has zero momentum relative to us here on earth but has alot of momentum relative to someone on mars. It can not have zero momentum and alot of momentum at the same time, it depends on ones frame of reference. My point is that momentum is not at 'concrete" thing.
Refer to the 'Conservation of linear momentum' in Wikipedia.org, "The World's Encyclopedia"
*Check out related links*
What else can I help you with?
Is momentum and energy the same?
No. KE = 1/2mv2, and momentum = m•v, where m is mass in kg and v is velocity in m/s.
What is the speed of an object when it is moving so that its kinetic energy is 93.3 J and the magnitude of its momentum is 37.9 kg meters per sec?
Momentum = (m V) = 37.9KE = (1/2 m V2) = 93.31/2 m V2 = (1/2 V) (m V) = 93.3(1/2 V) (37.9) = 93.31/2 V = 93.3/37.9V = 2 x 93.3 / 37.9 = 4.9235 meters per second (rounded)Bonus ! ... now we also know that the object's mass is [ 37.9 / 4.9235 ] = 7.697 kg (rounded)
When a 3.8 kg rifle fires a 13 gram bullet it experiences a recoil velocity of 2.4ms-1Calculate the velocity of the bullet?
Before the shot, total momentum of the rifle/bullet system is zero. Momentum is conserved, so must total zero after the shot. Magnitude of momentum = m V (mass, speed); we'll take care of direction independently. Momentum of the rifle: m V = (3.8) x (2.4) = 9.12 kg-m/sec backwards. We need momentum of the bullet = 9.12 kg-m/sec forward m V = 9.12 ===> V = ( 9.12 / m ) = ( 9.12 / 0.013 ) = 701.54 m/s forward
What is the mass of an object multiplied by its velocity?
The product of an object's mass and velocity is known as momentum. Momentum is defined as mass times velocity and is a vector quantity, meaning it has both magnitude and direction. It is often denoted by the symbol "p."
What is Change in momentum times time?
Impulse = [(change in momentum)/time]*time[(change in momentum)/time] = ForceAnd when force acts for a period of time, that impulse changes the momentum of the object.You can also rewrite the impulse equation as: I = F*tHowever, for change in momentum times time, the units would be (kg*m/s)*(s) = kg*m. These units are not in common usage.
What would the formula be for mass and momentum?
The formula for mass is given as ( m = \frac{F}{a} ), where ( m ) is mass, ( F ) is force, and ( a ) is acceleration. The formula for momentum is ( p = m \times v ), where ( p ) is momentum, ( m ) is mass, and ( v ) is velocity.
What is momentum is equal to?
Momentum equals mass times velocity, it is sometimes written as p=m*v.
What is the formula for momentum is equal to mass times velocity?
The formula for momentum is given by the product of an object's mass and its velocity, expressed as p = m * v, where p represents momentum, m is mass, and v is velocity.
What is the formula to calculate momentum?
Momentum (p) is mass (m) times velocity (v), so p = mv
How are velocitymassand momentum related?
momentum is the product of mass and velocity. p for momentum m for mass and v for velocity. (p=m*v)
What is the relationship of the speed of an object and its momentum?
Momentum (p) is equal to mass (m) times velocity (v), so p = mv
How do you calculate momentum?
Momentum = mass x velocity. Using standard terminology, p = mv. Δp = m v - m0 v0 (Change in mass = mass x velocity - initial mass x initial velocity ) If your mass stays the same, this can be simplified to Δp = m ( v - v0 )
How do you determine the momentum of a moving object?
Momentum is the product of mas and velocity . Its unit is kgm/s. P = m*v where P = momentum, m = mass v = velocity
Does a plane flying through the air have a momentum of zero?
No, it does not have a momentum of zero because the formula for momentum is p = m x v, therefore since the plane has a mass and it is moving, there is momentum.*p = momentum*m = mass (kg)*v = velocity (m/s)
Does a fish have momentum?
Yes, a fish has momentum as it swims through the water. Momentum is calculated by multiplying an object’s mass by its velocity, and as a fish moves through the water, it possesses both mass and velocity, resulting in momentum.
How do you find momentum?
p=m*v
What equation can you use to calculate object momentum p?
The equation to calculate object momentum is: p = m * v where p is momentum, m is mass of the object, and v is the velocity of the object.
