HARD
9th CBSE
IMPORTANT
Earn 100
A ball is dropped on the floor from a height of . It rebounds to a height of . If the ball is in contact with the floor for , then the average acceleration during contact is:
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Important Questions on Competition Corner-1
HARD
9th CBSE
IMPORTANT
The acceleration of a point on the rim of flywheel in diameter, if it makes is
HARD
9th CBSE
IMPORTANT
A stone is thrown vertically upward with an initial velocity , from the top of a tower, reaches ground with a velocity . The height of the tower is:
MEDIUM
9th CBSE
IMPORTANT
The relationship between average speed, time and distance is
MEDIUM
9th CBSE
IMPORTANT
If a ball is thrown up with a certain velocity, it attains a height of and comes back to the thrower, then:
HARD
9th CBSE
IMPORTANT
A phonograph record on turn table rotates at . The linear speed of a point on the record at the needle, at the beginning of the recording when it is at a distance of from the center is
MEDIUM
9th CBSE
IMPORTANT
Acceleration of a body projected upwards with a certain velocity is
HARD
9th CBSE
IMPORTANT
A body moving along a circular path has
HARD
9th CBSE
IMPORTANT
If a body of mass is moving on a circular path of diameter at a rate of , then centripetal force acting on the body is
