Question 350: Thermodynamics & KTG

Question

A 100 g of iron nail is hit by a 1.5 kg hammer striking at a velocity of 60 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 = 0.42 Jg$$-$$1 $$^\circ$$C$$-$$1]

Accepted Answer

$${1 \over 2} 	imes 1.5 	imes {60^2} 	imes {1 \over 4} = 100 	imes 0.42 	imes \Delta T$$
$$\Delta T = {{1.5 	imes {{60}^2}} \over {8 	imes 100 	imes 0.42}} = 16.07^\circ C$$

Answer

675$$^\circ$$C

Answer

1600$$^\circ$$C

Answer

16.07$$^\circ$$C

Answer

6.75$$^\circ$$C

Thermodynamics & KTG

A 100 g of iron nail is hit by a 1.5 kg hammer striking at a velocity of 60 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 = 0.42 Jg-1 ^\circC-$1]

Choose the correct answer: