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CBSE Notes 2011-2012 » IX-Science

# Force and Laws of Motion

## Impulse has the S.I. unit of ________.

Multiple choice question

Impulse has the S.I. unit of ________.

## A : Atheletes fall on a cushion in a high jump event to avoid getting hurt. B : Time to come to rest...

Multiple choice question

A : Atheletes fall on a cushion in a high jump event to avoid getting hurt.
B : Time to come to rest is increased to reduce the force.

## A : Force can change the direction and magnitude of the velocity. B : Acceleration may be acquired d...

Multiple choice question

A : Force can change the direction and magnitude of the velocity.
B : Acceleration may be acquired due to the reduction in the mass of the body under motion.
C : Two masses moving with the same velocity can be stopped in distances S1 and S2 (< S1) such that m1 > m2 with the same retarding force.

## A : The ratio of the S.I. to C.G.S. unit of forces is 105. B : Water evolving out of a hose exerts n...

Multiple choice question

A : The ratio of the S.I. to C.G.S. unit of forces is 105.
B : Water evolving out of a hose exerts no force on the pipe.

## A force of 5 N applied on m1 produces an acceleration of 8 m/s2 and when applied on m2 produces an a...

Multiple choice question

A force of 5 N applied on m1 produces an acceleration of 8 m/s2 and when applied on m2 produces an acceleration of 24 m/s2. When they are tied together, the acceleration will be

## Two automobiles of mass 3000 kg and 5000 kg moving towards each other with velocities 25 m/s and 15 ...

Multiple choice question

Two automobiles of mass 3000 kg and 5000 kg moving towards each other with velocities 25 m/s and 15 m/s undergo collision. After collision the lighter one comes to a halt in 25 m distance. If the same retardation exists for the heavier also, the distance covered by it will be