Physic

A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block's acceleration.

  1. 👍 0
  2. 👎 1
  3. 👁 1,869
asked by Don
  1. (a) Friction= u * Normal
    Friction= 0.25 * Normal
    Normal=15*sin(40) + mg = 43.94
    Friction= 0.25 * 43.94 = 10.985N

    (b) 19*cos(40) - 10.985 = 0.5 N
    F =ma
    0.5N = 3.5kg * a
    a = 0.14 m/s^2

    1. 👍 3
    2. 👎 1
    posted by Can
  2. correction on the above answer. It should say 15*cos(40) for part B.

    1. 👍 3
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 17 N at an angle θ = 35° with the horizontal (Figure 6-20). The coefficient of kinetic friction between the block and floor is

    asked by Sam on July 14, 2010
  2. physics

    A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 17 N at an angle θ = 35° with the horizontal (Figure 6-20). The coefficient of kinetic friction between the block and floor is

    asked by Sam on July 14, 2010
  3. PHYSICS

    A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle 40° with the horizontal (Fig. 6-19). The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes

    asked by Carmen on November 14, 2016
  4. physics

    A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.(a) Calculate the magnitude of the

    asked by Alejandra on October 2, 2010
  5. AP Physics C

    A 4.10 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 39.0 N. Figure 6-26 gives the block's speed v versus time t as the block moves along an x axis on the floor. What is the

    asked by John on October 28, 2014
  6. Physics

    A 3.4 kg block is pushed along a horizontal floor by a force of magnitude 21 N at a downward angle θ = 40°. The coefficient of kinetic friction between the block and the floor is 0.26. What the magnitude of the block's

    asked by Tom on October 23, 2011
  7. physics

    A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N at an angle theta=23.0degrees above the horizontal, as shown. What is the magnitude of the acceleration of the block when

    asked by Rachel on January 28, 2012
  8. Physics/Math

    A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the

    asked by COFFEE on February 10, 2007
  9. physics

    A 3.90 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1N at an angle theta=32.5degrees above the horizontal, as shown. a.) What is the magnitude of the acceleration of the block

    asked by Carly on October 8, 2015
  10. physics

    A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the

    asked by maya on November 18, 2010

More Similar Questions