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CBSE Notes 2011-2012 » IX-Science

Force and Laws of Motion

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.

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.

The unit of momentum can be expressed as,

Multiple choice question

The unit of momentum can be expressed as,

Impulse due to a force acting on a body is A : area below force-time graph B : change in momentum

Multiple choice question

Impulse due to a force acting on a body is
A : area below force-time graph
B : change in momentum

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