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A lead bullet of 10g travelling at 300m/...

`A` lead bullet of `10g` travelling at `300m//s` strikes against a block of wood and comes to rest. Assuming `50%` heat is absorbed by the bullet, the increase in its temperature is (sp-heat of lead is `150J//Kg-K`)

A

`100^(@)C`

B

`125^(@)C`

C

`150^(@)C`

D

`200^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
C
Heat absored, `mcDeltaT=1/2(1/2mv^(2))`
`DeltaT = (v^(2)/(4c) = (300)^(2)/(4C) = (300)^(2)/(4 xx 150)= 150^(@)`C
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