Test Pârghii

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| By IuditaBalc
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IuditaBalc
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  • 1/5 întrebări

    Un om ridică un dulap cu masa de 200 kg la înălțimea de 5 metri folosind un scripete fix. Calculează forța cu care trebuie să acționeze omul.

    • R=m*g R=200kg*10N/kg=2000N F=R, F=2000N
    • F=R/2 F=1000N
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Test Pârghii - Quiz
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Clasa a VII-a
Toate subiectele sunt obligatorii.


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  • 2. 

    Identifică pârgiile de tipul 2

    • Roaba

    • Cleștele de spart nuci

    • Ciocanul

    • Ranga

    Correct Answer
    A. Roaba
    Explanation
    The correct answer is "roaba". This is because the other options listed (cleștele de spart nuci, ciocanul, ranga) are not types of pârgii (levers), but rather different tools. A "roaba" is a type of lever commonly used for transporting heavy loads, making it the correct answer.

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  • 3. 

    Folosind o rangă brațul forței active este mai mic decât brațul forței rezistente

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is saying that the active force arm is smaller than the resistant force arm. This is false because in a lever system, the force arm is the perpendicular distance between the line of action of the force and the fulcrum. The active force arm is the distance from the point where the input force is applied to the fulcrum, while the resistant force arm is the distance from the point where the output force is applied to the fulcrum. In a mechanical advantage system, the active force arm is typically longer than the resistant force arm, allowing for a greater output force compared to the input force.

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  • 4. 

    Ranga este o parghie de tipul .................... Creionul este o pârghie de tipul ..................... Deplasarea forței active în cazul creionului este mai ............................. decât deplasarea forței rezistente.

    Correct Answer
    Ranga este o pârghie de tipul 1. Creionul este o pârghie de tipul 3. deplasarea forței active în cazul creionului este mai mică decât deplasarea forței rezistente
    Explanation
    The given answer states that "Ranga este o pârghie de tipul 1" which means that Ranga is a lever of type 1. It also states that "Creionul este o pârghie de tipul 3" which means that the pencil is a lever of type 3. Finally, it states that "deplasarea forței active în cazul creionului este mai mică decât deplasarea forței rezistente" which means that the displacement of the active force in the case of the pencil is smaller than the displacement of the resistant force.

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  • 5. 

    Scrie un eseu cu titlul O zi la bunici in care să numești 10 pârghii.

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  • Jul 22, 2024
    Quiz Edited by
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  • Jan 28, 2012
    Quiz Created by
    IuditaBalc
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