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24 October, 11:38

An Iron weight, suspended by a string, is motionless. The tension in the string is 4,75 newtons What is the mass of the iron weight?

A 0.485 kilograms

4.75 kilograms

C 9.65 kilograms

OD 10.0 kilograms

15,5 kilograms

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Answers (1)
  1. 24 October, 15:34
    0
    Answer: A

    0.485 Kg

    Explanation:

    Since the iron weight is motionless, the magnitude of tension T in the string will be equal but opposite to the magnitude of the weight W.

    T = W

    Where W = mg

    T = mg

    Where T = 4.75 N, g = 9.81m/s^2

    4.75 = 9.81m

    m = 4.75/9.81

    m = 0.485 Kg

    Therefore, the mass of the iron weight is approximately 0.485 kg
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