Physics
In which of the following cases, kinetic energy is being used in performing work ?

Paddling the bicycle to cover a distance
Driving a car to cover a distance
Rowing a boat in the lake
Wind mill grinding wheat grain

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

They fall with same ultimate velocity
They fall with that ultimate velocity, which are different for different droplets
Their velocity increases and they fall with different velocity on the earth
Their velocity increases and they fall with same velocity on the earth

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