Physics

Question

A 50.-Newton horizontal force is needed to keep an object weighing 500. Newtons moving at a constant velocity of 2.0 meters per second across a horizontal surface. The magnitude of the frictional force acting on the object is

2 Answer

  • -- "Constant velocity" means the acceleration of the object is zero.

    -- "Zero acceleration" means that all the forces on the object add up to zero.

    -- If a force of 50-newtons is pulling the object in one direction
    and the object's speed is constant, then the frictional force on
    the object must be 50 newtons in the opposite direction.
  • The magnitude of the frictional force acting on the object is 50 N.

    Given :

    Horizontal Force = 50 N

    Object weight = 500 N

    Constant Velocity = 2 m/sec

    Solution --

    Constant velocity means acceleration is zero. And from Newton's second law of motion,

    [tex]\rm \sum F = ma[/tex]  ---- (1)

    Here a = 0, therefore from equation (1) we get:

    [tex]\rm \sum F = 0[/tex]

    [tex]\rm F_1 - 50 = 0[/tex]

    where [tex]\rm F_1[/tex] is friction force,

    [tex]\rm F_1 = 50 \;N[/tex]

    The magnitude of the frictional force acting on the object is 50 N.

    For more information, refer the link given below

    https://brainly.com/question/23073749

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