EASY
9th CBSE
IMPORTANT
Earn 100
Driver of a train travelling at 115 km/hr sees on a same track, 100 m in front of him, a slow train travelling in the same direction at 25 km/hr. The least retardation that must be applied to faster train to avoid a collision is
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Important Questions on Competition Corner-1
EASY
9th CBSE
IMPORTANT
The ampere is the SI unit of
EASY
9th CBSE
IMPORTANT
Distance of the moon from the earth is . The time taken by a radar signal transmitted from the earth to reach the moon is
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9th CBSE
IMPORTANT
The prefix to denote is
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9th CBSE
IMPORTANT
A stone is dropped into a well in which the level of water is h, below the top of the well. If v is velocity of sound, then time T after which the splash is heard is equal to
MEDIUM
9th CBSE
IMPORTANT
Magnitude of a vector is never
HARD
9th CBSE
IMPORTANT
A stone weighing falls from the top of a tower high and buries itself deep in sand. The time of penetration is:
EASY
9th CBSE
IMPORTANT
SI unit of velocity is
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9th CBSE
IMPORTANT
A body is moving along a straight line at undergoes an acceleration of . After its speed will be
