physics

A force of 20 N is needed to overcome a frictional force if 5 N and accelerate a 3 kg mass across a floor. What is the acceleration of the mass?

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  1. F = m a
    F = 20-5 = 15N
    so
    15 = 3 a
    a = 5 m/s^2

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  2. a= 5m/^2

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