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  1. (b) 0 N. Since velocity is constant, so acceleration and hence force applied is zero. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/

    (b) 0 N. Since velocity is constant, so acceleration and hence force applied is zero.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/

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  2. The number that is neither positive nor negative is zero. Zero represents a neutral point on the number line and does not have a positive or negative value. It is the dividing point between positive and negative numbers. Click here for more: https://www.tiwariacademy.com/ncert-solutions/class-6/mathRead more

    The number that is neither positive nor negative is zero. Zero represents a neutral point on the number line and does not have a positive or negative value. It is the dividing point between positive and negative numbers.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

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  3. Numbers that are less than zero are known as negative numbers. Such numbers appear on the left-hand side of the number line, and these values are smaller than zero. Click here for more: https://www.tiwariacademy.com/ncert-solutions/class-6/maths/ 

    Numbers that are less than zero are known as negative numbers. Such numbers appear on the left-hand side of the number line, and these values are smaller than zero.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/ 

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  4. When a shape has both reflection and rotational symmetry it means that the shape can be folded along a line (reflection symmetry) and can be rotated around a central point (rotational symmetry) without changing its appearance. Therefore it has both types of symmetry. Click here for more: https://wwwRead more

    When a shape has both reflection and rotational symmetry it means that the shape can be folded along a line (reflection symmetry) and can be rotated around a central point (rotational symmetry) without changing its appearance. Therefore it has both types of symmetry.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

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