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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minQB

PhysicsEasyinteger

A 1 kg hammer head moving at 4 m/s is stopped by a nail on each blow. Twenty-five such blows are delivered quickly and a 40 g nail $(c = 500 J / (kg K))$ absorbs all the heat. Find the temperature rise of the nail in K.

Answer:

Solution:

Energy per blow $= \frac{1}{2} (1) (16) = 8 J; 25$ blows $= 200 J$ . Heat capacity of nail $= 0.04 (500) = 20 J / K .Δ T =$ $\frac{200}{20} = 10 K$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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