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17 October, 13:18

What is the net force acting on a 1-kg ball in free fall?

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Answers (2)
  1. 17 October, 13:19
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    Answer: 9.81N

    Explanation:

    According to newton's second law, Force = mass*acceleration i. e F = ma

    Since the it is a free fall, the body is under the influence of gravity. The acceleration of the body will become acceleration due to gravity i. e + g

    Force acting on the body will become F = mg

    Given m = 1kg and g = 9.81m/s²

    F = 1*9.81

    F = 9.81N

    The net force acting on the body is 9.81N

    Note that g is positive because the body is coming downwards
  2. 17 October, 13:29
    0
    9.81 N Downward

    Explanation:

    The Net force acting on a body that falls freely is the weight of that body.

    F = W.

    Where F = net force

    Weight: This can be defined as the force acting on an object due to gravity.

    It can be expressed as

    W = mg ... Equation 1

    Where W = weight of the ball, m = mass of the ball, g = acceleration due to gravity.

    Given: m = 1 kg,

    Constant: g = 9.81 m/s²

    Substitute into equation

    W = 1 (9.81)

    W = 9.81 N.

    Hence the net force acting on the ball = 9.81 N Downward
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