Answer :
m=M, the mass of two balls must be same then will the first ball m come to a stop while the second ball M moves off.
In physics, mass is a way to quantify inertia, a fundamental property of all matter. In essence, it's the resistance of a mass of matter to altering its direction or speed in reaction to the application of a force. The more mass a body possesses, the smaller the change that is brought about by an applied force.
The kilogram, which is defined as equal to 6.62607015 1034 joule second in terms of Planck's constant, is the unit of mass in the International System of Units (SI). A joule is equivalent to one kilogram multiplied by one square meter per second. The kilogram is determined by precise measurements of Planck's constant, the second and the meter having already been established in terms of other physical constants.
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