Question

a bullet having a mass of 10 gram and moving bullet with a speed of 1.5 m second penetrates a thick wood plank of mass 90 gram the plan was initially at rest the bullet gets embedded in the plant and the both move together determine their velocity

Answer 1

Answer:

Explanation:

Its simple dear

Mass of bullet = 0.01kg

Mass of plank= 0.09kg

Speed of bullet= 1.5m/s

Total momentum before firing bullet

=(0.01+0.09)0

=0

Total momentum after firing bullet

=0.01kg(1.5)+ 0.09kgm/s

= 0.015+0.09kgm/s

Using law of conservation

0=0.015+0.09v

-0.015= 0.09v

-0.015/0.09=v

=-0.1666666667m/s

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