Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediummultiple choice

A 4 kg block is thrown at 6 m/s along a rough floor with $μ = 0.25 (g = 10 m / s^{2})$ . Choose all correct statements.

Options:(select one or more)

Answer:

A, C, D

Solution:

Heat = initial $KE = \frac{1}{2} (4) (36) = 72 J$ , so A is true. Heat is frame independent, so B is false. In the moving frame the block goes from rest to 6 m/s the opposite way: KE gain 72 J, C true. Distance $= \frac{v ^{2}}{2 μg} =$ $\frac{36}{5} = 7.2 m$ , D true. A, C, D.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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