Which of the following laws of motion is related to inertia?
a) First law
b) Second Law
c) Third Law
d) Fourth Law

Answer

A

Explanation

mass of bullet `m=0.02 k`
`Initial velocityof bullet V_1=500m/sec`
Mass of blcok M=10kg `
Initial velocity of block `=U_2=0`
`FiN/Al velocity of bullet =10 m/sec
`=v^1
Let the fiN/Al velocityi of block when the bullet consevation of energy.
`mv_1+mv_2=mv+Mv^1` ltbr `rarr 0.02xx500=0.02xx10++10xxv^1`
`rarr v^1=0.8m/sec`
After moving distance 0.02 m it stops.
`rarr Change in K.E. =Work done
`rarr 0-(1/2)xx10xx(0.8)^2=Mxx10xx10xx0.2`
`rarr M=0.16`