Which is a complete description of the momentum of an object? O 4.2 m/s, east
O 2.4 kg/m
O2 kg/s
O 1.9 kg*m/s, west

The correct option is D, which is 1.9 kg*m/s, west.

Momentum is defined as the quantity of motion an object has.

For example, if a stone is moving down the slope the stone will have some momentum, which will be the quantity of motion the stone will have.

Further, the momentum(p) is given as a product of mass and velocity. And it is written as,

,

.

For, the unit of momentum,

thus, the unit for momentum is kg m/sec.

From all the given options, only option D shows the correct unit for momentum. therefore, the correct option is D, which is 1.9 kg*m/s, west.

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1.9 kg*m/s, west

Explanation:

Momentum is the quantity of motion a body possesses.

 It is expressed as:

 Momentum  = mass x velocity

 The unit of mass is kg;   velocity is in m/s

So  momentum unit is kgm/s

Also, this quantity is a vector, so, it not only has magnitude, the direction must be included