A carpenter is driving a nail into a board. The 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Assume that half of the kinetic energy of the hammer is transformed into heat in the 15.0-g steel nail and does not flow out. What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448 J/(kg·K).

Question

Quizplus · Accepted Answer

The correct answer is A.The kinetic energy of the hammer is 36.1 J. Half of this energy is 18.05 J. The mass of the nail is 0.015 kg. The specific heat of steel is 448 J/(kg·K). The increase in temperature of the nail is 18.05 J / (0.015 kg * 448 J/(kg·K)) = 8.1 K.

A Carpenter Is Driving a Nail into a Board