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An external force….. To keep a body…. Ac...

An external force….. To keep a body…. According to….. .

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is required , in unifrom motion , Aristotle .
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External forces

Assertion : An external force is required to keep a body in motion. Reason : If the net external force is zero, a body at rest continues to remain at rest and a body in motion continues to move with a uniform velocity.

An external force is required to keep a body in uniform motion This statement was given by.

If no external force acts on a body, it will

If no external force acts on a system

Knowledge Check

  • External forces

    A
    are always balanced
    B
    never balanced
    C
    may or may not be balanced
    D
    None of these

  • External forces are

    A
    always balanced
    B
    never balanced
    C
    may or may not be balanced
    D
    none of these

  • Assertion : An external force is required to keep a body in motion. Reason : If the net external force is zero, a body at rest continues to remain at rest and a body in motion continues to move with a uniform velocity.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true and reason is the not correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.
    • PRADEEP-LAWS OF MOTION-Fill in the blanks
    1. An external force….. To keep a body…. According to….. .

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    2. ……. Force is acting on a body ……or in ……with …… according to……. .

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    3. Linear momentum of a body is defined as….. .

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    4. The net force on a body is equal to…… and…… .

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    5. Acceleration of a body can be……. Only if…….

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    6. The inability of a body….. Its state….. Or……is called…….of the body.

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    7. One newton force is ……..produce an acceleration of…….in a body of……. .

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    8. Impulse of a force is …….and…… .

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    9. In an isolated system……of……is…..and is not affected by .

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    10. Burnt out speed of a rocket …..when…… .

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    11. Friction arises on account of……..at the ……..

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    12. When surfaces in contact are…..friction between them….instead of….. .

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    13. ……. Is a self….. Force .

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    14. The magnitude of the force of ….. Between any two bodies in contact is...

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    15. Coefficient of limiting frictions between any two surfaces in contact ...

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    16. Angle of friction between any two surfaces in contact is…… of force of...

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    17. Friction always…….

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    18. Frictions is a…… though it is…….

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    19. Centripetal force is …… to move a body ….. In a…..

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    20. Banking of roads is the phenomenon of…… outer edge of the road…… the i...

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