Self Studies

Forces and Laws...

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  • Question 1
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    A machine gun fires a bullet of mass 40 g40 \ g with a velocity 1200 ms11200 \ ms^{-1}. The man holding it can exert a maximum force of 144 N144 \ N on the gun. How many bullets can he fire per second at the most? 

  • Question 2
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    Cleaning of dust from carpet is due to _____.

  • Question 3
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    Assertion (A): According to Newton’s third law sum of action and reaction is not equal to zero 

    Reason (R) : The forces action and reaction acts on different bodies.

  • Question 4
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    A force of 12 N gives an object an acceleration of 4m/s2^{2}. The force required to give it an acceleration of 10m/s2^{2} is

  • Question 5
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    If action force acting on a body is gravitational in nature, the reaction force:

  • Question 6
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    Match list (I) with List (II)

    List I List II
    a) Recoil of gune) Newtons first law
    b) Acceleration in one dimension and motion in two dimensionsf) Newtons second law
    c) Definition of forceg) Projectile motion
    d) Measurement of forceh) Newton’s third law

  • Question 7
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    Which of following Newton's laws reveals the underlying symmetry in the forces that occur in nature?

  • Question 8
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    Which of the following is the most significant law of motion given by Newton?

  • Question 9
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    A man is stranded in the middle of a perfectly smooth island of ice, where there is no friction between the ground and his feet. Under these circumstances,

  • Question 10
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    Action and reaction forces never balance out. Because,

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