Physics
When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

Acceleration
Velocity
Displacement
Energy

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Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in rolling is more than in lifting.
Work done in rolling a stone is less than in lifting it.
Work done in both is same but the rate of doing work is less in rolling.
Work done in lifting the stone is equal to rolling it.

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Physics
Circuit breaker usually operate under

Transient state of short-circuit current
Steady state of short-circuit current
After D. C. component has ceased
Sub-transient state of short-circuit current

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