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  3. a)an object of mass ?m rests on a horizontal frict

a)An object of mass ?m rests on a horizontal frictionless surface. A constant horizontal force of...

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Physics

a)An object of mass ?m rests on a horizontal frictionlesssurface. A constant horizontal force of magnitude ?F is applied tothe object. This force produces an acceleration:

  • always
  • only if ?F is larger than the weight of the object
  • only while the object suddenly changes from rest to motion
  • only if ?F is increasing

choice A

b)Now let there be friction between the surface and the object.If the object has a mass of 10 kg, and ??μs = 0.4, and??=0.3μk=0.3, how much force would be required to cause the objectto move?

c)If this force is then applied continuously, how far will theobject be displaced after 4.8 seconds?

d)How fast will it be going after pulling with the same forceabove for 4.8 seconds?

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