Question

Mass X velocity =
(A) impulse.
(B) momentum.
(C) area.
(D) force.

Answer 1

Hint: Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration.

Complete step by step answer:
In Newtonian mechanics, linear momentum, translational momentum, or simply momentum is the product of the mass of an object and velocity of an object. Momentum is a vector quantity, which contains both the magnitude and a direction. If $m$ denotes the mass of the object and $v$ denotes the velocity of the object (which is also a vector quantity), then the momentum of the object is, Momentum of the body is defined as the product of mass of the body and its velocity.
Momentum of an object is, $\overrightarrow{P}=\overrightarrow{m}\times \overrightarrow{v}$

The SI units of momentum is measured in kilogram meters per second that is $Kgm{s}^{-1}$. Newton's second law of motion states that the rate of change of a body's momentum is the same as the total force acting on it. Momentum depends on the frame of reference, but in any inertial frame it is a preserved quantity, meaning that if a closed system is not affected by external forces, its total linear momentum does not change. Momentum is also conserved in special relativity (with a modified formula) and, in a modified form, in electrodynamics, quantum mechanics, quantum field theory, and general relativity. It is an expression of one of the fundamental symmetries of space and time: translational symmetry.

Therefore, mass x velocity = momentum.

So, the correct answer is “Option B”.

Note:
In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction. Impulse is the change of momentum of an object when the object is forced upon by a force for an interval of time. That is, with the help of impulse, we can calculate the change in momentum, or we can use impulse to calculate the average impact force of a collision.