Phyics

If a 68kg object is being pulled across the hard floor with a horizontal force of 400N...

a. What would the acceleration of the object be if it was on a frictionless floor?
b. if there were friction, what would the force of friction be if it was pulled at a constant velocity?
c. If it wasn't at a constant velocity, but instead accelerating at 3.2m/s^2, what would the force of friction be acting on the object?
d. What would the coefficient be when the object accelerates at 3.2m/s^2

Thanks!

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  1. a. Try using Newton's second law. (F = ma)
    b. Ditto. acceleration (a) equals zero. What does that tell you about the net force?
    c. Again, use Newton's second law
    d. Use the definition of the coefficient of (kinetic) friction, together with the friction force and the weight.

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