Question

pls give ans in photo​

Answer 1

Answer:

mass of bullet=10g=0.01kg

velocity of bullet=1.5 m/s

mass of plank=90g=0.09kg

• Formula which is used

$\sf \red{ Total \: momentum \: before \: collision=mass \: of \: plank × velocity}$

=0.01×1.5+0.09×0

=0.015kg m/s

Total momentum after collision=(mass of bullet +mass of plank )× velocity

=0.1kg×V=0.1Vkg m/s

• According to law of conservation of momentum,

Total momentum before collision=Total momentum after collision 0.015kg m/s =0.1 V kg m/s

velocity acquired by the plank and the bullet=0.15 m/s

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