Physics

posted by .

a force of 400 N Pushes on a 30 kg box. Starting from rest, the box attains a speed of 4 m/s in 5 seconds. determine the mu between the box and floor.

  • Physics -

    net force= ma
    400-forcefriction=ma
    400-mu*mg=ma
    where a= 4/5 m/s^2
    solve for mu

  • Physics -

    I've tried over and over and get mu = .36 which I know is wrong. (Supposed to be .51)

    What am I doing wrong?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting …
  2. Physics help!

    A box of books weighing 323 N is shoved across the floor by a force of 477 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.51, how long does it take to move the box 4.80 …
  3. Physics

    A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.0° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long …
  4. physics

    A box of books weighing 314 N is shoved across the floor by a force of 475 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.53, how long does it take to move the box 5.00 …
  5. Physics

    A box of books weighing 290 N is shoved across the floor of an apartment by a force of 400 N exerted downward at an angle of 35.1° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long …
  6. mechanics

    A 2kg box sits at rest on a level floor. Two children push on the box at the same time. Eli pushes horizontally to the right on the box with a force of 4N. Jamie pushes straight downward on the box with a force of 3N. The box does …
  7. Physics

    A 25 kg box is along a horizontal floor and a force of 400 N pushes the box with an angle of 50 deg with the horizontal. Starting from rest, the box achieves a velocity of 2 m/s in a time of 4 seconds. Find the coefficient of sliding …
  8. Physics

    A box of books weighing 337 N is shoved across the floor by a force of 467 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.56, how long does it take to move the box 4.00 …
  9. Physics

    A box of books weighing 337 N is shoved across the floor by a force of 467 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.56, how long does it take to move the box 4.00 …
  10. Physics

    A 25 kg box is along a horizontal floor and a force of 400 N pushes the box with an angle of 50 degree with the horizontal. Starting from rest, the box achieves a velocity of 2 m/s in a time of 4 seconds. Find the coefficient of sliding …

More Similar Questions