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CBSE
Class 9 Science
Force And Laws Of Motion
Quiz 2
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Action and reaction are equal and opposite and they act on?
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Same body
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different bodies
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None of these
Which one of these is not vector quantity?
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Impulse
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Momentum
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Force
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None of these
There are two statements made Statement A: A Rate of change of momentum corresponds to force Statement B: Rate of change of momentum corresponds to Kinetic Energy Which one of the following is correct?
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A only
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B only
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Both A and B are correct
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Both A and B are wrong
which one of these is not a correct formula?
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$F=ma^2$
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Impulse=change in momentum
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$Force=ma$
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$p=mv$
The inertia of an object tends to cause the object?
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to decelerate due to friction
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to resist any change in its state of motion
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to increase the speed
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None of these
An object of mass 200kg is accelerated uniformly from a velocity of 4m/s to 8m/s in 2 seconds. What is the formula for Impulse?
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Impulse=change in Momentum
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Impulse=Force exerted
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Impulse=mass X velocity
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None of these
What is the final momentum of the object?
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400 kg m/s
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800 kg m/s
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1600 kg m/s
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none of these
find the magnitude of the force exerted on the object?
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800 N
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100 N
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200 N
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400 N
A force of 50 N acts on a mass of 500 g resting on a friction less surface. What is the acceleration produced?
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5 m/s2
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25 m/s2
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100 m/s2
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10 m/s2
A object of mass 5 g is pushed on a table. The object starts moving at a speed of 15 m/s and stops in 5 seconds. Find the force of friction exerted by the table on the object.?
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.01 N
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.012 N
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.115 N
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.015 N
The change in momentum of a body in 0.02 sec is 10 kg m/s. Find the force acting on this body?
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5000 N
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10 N
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1000 N
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500 N
A truck of mass 100 kg starts at rest and moves in a straight road with constant acceleration 5 m/s2 .What is the momentum after 5 sec?
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2500 Kg m/s
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250 kg m/s
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500 kg m/s
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none of these
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