Question

a bullet having a mass of in 10 gram and moving with a speed of 1.5 metre per second penetrates thick wooden plank of of mass 900 gram the wooden plank was initially at rest the bullet gets embedded in the plank and both moon together determine their velocity​

Answer 1

Answer:

mass of bullet=10g=0.01kg

velocity of bullet=1.5

s

m

mass of plank=90g=0.09kg

Total momentum before collision=mass of plank × velocity

=0.01×1.5+0.09×0=0.015kg

s

m

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

=0.1kg×V=0.1Vkg

s

m

According to law of conservation of momentum,

Total momentum before collision=Total momentum after collision

0.015kg

s

m

=0.1vkg

s

m

velocity acquired by the plank and the bullet=0.15

s

m

Explanation:

I m not sure about this answer