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8 January, 21:11

3. What average net force is required to stop a 7 kg shopping cart in 2 s if it's initially

traveling at 3.5 m/s?

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Answers (1)
  1. 8 January, 21:37
    0
    The force required to stop the shopping cart is, F = 12.25 N

    Explanation:

    Given data,

    The mass of the shopping cart, m = 7 kg

    The initial velocity of the shopping cart, u = 3.5 m/s

    The final velocity of the shopping cart, v = 0 m/s

    The time period of acceleration, t = 2 s

    The change in momentum of the cart,

    p = m (u - v)

    = 7 (3.5 - 0)

    = 24.5 kg m/s

    The force is defined as the rate of change of momentum. To stop the shopping cart, the force required is given by the formula

    F = p / t

    = 24.5 / 2

    = 12.25 N

    Hence, the force required to stop the shopping cart is, F = 12.25 N
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