A solid non rotating steel ball of mass $$1$$ kg, moving with a velocity of $$4$$ $$m/s$$ strikes a stationary steel ball of mass $$2$$ kg. Just after the impact the velocity of the $$1$$ kg ball becomes $$2$$ $$m/s$$. If the duration of impact is $$0.1$$ $$sec$$, then average impulsive force on each ball is

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Infinity Learn · Accepted Answer

Magnitude of impulse on $$1$$ kg ball is I where I $$=$$ (1$$ x $$4$$ $$-1$$ x $$2) $$kg-m/s$$ $$=$$ $$2$$ $$kg-m/s$$∴Average impulsive force $$F=I$$∆$$t=20.1N=20$$ N

A solid non rotating steel ball of mass 1 kg, moving with a velocity of 4 m/s strikes a stationary steel ball of mass 2 kg. Just after the impact the velocity of the 1 kg ball becomes 2 m/s. If the duration of impact is 0.1 sec, then average impulsive force on each ball is

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