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An external force is required to keep a ...

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

A

Aristotle

B

Newton

C

Archimedes

D

Einstein

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to identify who made the statement regarding the need for an external force to keep a body in uniform motion. The statement relates to the principles of motion and forces. ### Step-by-Step Solution: 1. **Understanding the Statement**: The statement "An external force is required to keep a body in uniform motion" suggests that there is a need for a force to maintain motion. This is contrary to the principle of inertia, which states that a body in motion will remain in motion unless acted upon by an external force. 2. **Identifying the Laws of Motion**: The statement can be associated with Newton's First Law of Motion, which states that an object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force. 3. **Evaluating the Options**: - **S. Total**: This does not correspond to any well-known physicist or law. - **Newton**: Refers to Sir Isaac Newton, who formulated the laws of motion. - **Archimedes**: Known for his work in buoyancy and hydrostatics, not for laws of motion. - **Einstein**: Known for the theory of relativity, not specifically for laws regarding uniform motion. 4. **Conclusion**: The correct answer is **Newton**, as he is the one who articulated the laws of motion, including the principle that an external force is necessary to change the state of motion of an object. ### Final Answer: The statement "An external force is required to keep a body in uniform motion" was given by **Newton**.
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Knowledge Check

  • The force required to keep a body in uniform circular motion is

    A
    Centripetal force
    B
    Centrifugal force
    C
    Resistance
    D
    None of the above

  • 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.

  • According to Newton s second law of motion F =ma where F is the force required to produce an acceleration a in a body of mass m If a = 0 then F = 0 no external force is required to move a body uniformly along a straight line If a force F acts on a body for t seconds the effect of the force is given by Impulse =F xx t =change in linear momentum of the body Average force exerted by the bat is .

    A
    `480N`
    B
    `120N`
    C
    `1200N`
    D
    `840N`

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    According to Newton s second law of motion F =ma where F is the force required to produce an acceleration a in a body of mass m If a = 0 then F = 0 no external force is required to move a body uniformly along a straight line If a force F acts on a body for t seconds the effect of the force is given by Impulse =F xx t = change in linear momentum of the body A cricket ball of mass 150g is moving with a velocity of 12m//s and is hit by a bat so that the ball is turned back with a velocity of 20m//s if duration of contact between the ball and the bat is 0.01sec The impulse of the force is .

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    Assertion : Force is required to move a body uniformly along a circle. Reason : When the motion is uniform, acceleration is zero.

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