Question

A ball of mass 200 gram is in motion along a straight line with a velocity of 81 km per hour what is its momentum

Answer 1

p=mv

p=200/1000×81×5/18
(convert gram into kg and km/h into m/s)

p=0.2×22.5=4.5kgm/s

hope it helps..

Answer 2

Heya!✋

Here is your answer.
==============================
Given that,

The mass of ball, m= 200g= 0.2kg
velocity, v= 81km\h = 22.5 m\s
so, its momentum = mv
=> 0.2×22.5
=> 4.5 kg m\s
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Hope it will help you. :)