MCQ
When the velocity of a body is doubled:
- AKinetic energy is doubled.
- BAcceleration is doubled.
- CMomentum is doubled.
- DPotential energy is doubled.
Explanation:
Momentum is directly proportional to the velocity, hence if velocity is doubled momentum will be doubled.
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$(A)$ the rate at which heat is absorbed in the range $0-100 \ K$ varies linearly with temperature $T$.
$(B)$ heat absorbed in increasing the temperature from $0-100 \ K$ is less than the heat required for increasing the temperature from $400-500 \ K$.
$(C)$ there is no change in the rate of heat absorbtion in the range $400-500 \ K$.
$(D)$ the rate of heat absorption increases in the range $200-300 \ K$.
(Take $\mathrm{g}=10 \;\mathrm{ms}^{-2}$ and the rope to be massless)