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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoCalorimetryMedium2 minQB

PhysicsMediumsingle choice

If a 5 kg body falls to the ground from a height of 30 m and if all its mechanical energy is converted into heat, then heat produced will be (approx)

Options:

Answer:

Solution:

All the lost gravitational potential energy becomes heat.
$Q = m g h$
$Q = 5 \times 9.8 \times 30 = 1470 J$
$Q = \frac{1470}{4.186} \approx 351 cal$
Approximately 350 cal. Answer A.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Calorimetry

⏱ 2mℹ️ Source: QB

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