hammer striking velocity | CALORIMETRY THERMAL EXPANSION.

JEE MAIN 2022

24-06-22 S2

Question

A 100 g of iron nail is hit by a 1.5 kg hammer striking at a velocity of $60 \mathrm{~ms}^{-1}$. What will be the rise in the temperature of the nail if one fourth of energy of the hammer goes into heating the nail? [Specific heat capacity of iron $\left.=0.42 \mathrm{Jg}^{-1}{ }^{\circ} \mathrm{C}^{-1}\right]$

Select the correct option:

$675^{\circ} \mathrm{C}$

$1600^{\circ} \mathrm{C}$

$160.7^{\circ} \mathrm{C}$

$6.75^{\circ} \mathrm{C}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\frac{1}{2} \times 1.5 \times 60^2 \times \frac{1}{4}=0.1 \times 420 \times \Delta T$

Question Tags

JEE Main

Physics