Question

a body of mass 2kg moving with a velocity of (2i^+j^+k^) , then it's momentum in kgms-1 is ....

Answer 1

momentum=2×(2i^+j^+k^)

Answer 2

Answer:

The momentum of the body in kg.m/s is $4\hat i+2\hat j+2\hat k$.

Explanation:

Given the mass of a body, $m= 2kg$

Body is moving with a velocity, $v=2\hat i+\hat j+\hat k ~m/s$

Momentum of a body is referred to as 'mass in motion', and is given by the product of mass and its velocity.

Mathematically, written as $\vec p=m.\vec v$

$=2(2\hat i+\hat j+\hat k)$

$=(2\times 2)\hat i+(2\times 1)\hat j+(2\times1)\hat k)$

$=4\hat i+2\hat j+2\hat k$

Therefore, the momentum of the body in kg.m/s is $4\hat i+2\hat j+2\hat k$.