Posted by **garth** on Thursday, June 7, 2012 at 8:27pm.

What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.38 and 0.28, respectively.

- physics -
**Henry**, Friday, June 8, 2012 at 1:10am
Given: Fs = 0.38, Fk = 0.28, m = ?.

Did you forget the mass?

Mass = 30kg(Assumed).

Wb = m*g = 30kg * 9.8N/kg = 294 N. =

Weight of box.

Fb = 294N @ 0 Deg. = Force of box.

Fp=294*sin(0)=0=Force parallel to floor

Fv = 294*cos(0) = 294 N. = Force perpendicular to floor.

Fn = Fp - u*Fv -u*Fv' = m*a. a = 0.

0 - 0.38*294 - 0.38Fv' = 0

-0.38Fv' = 0.38*294 = 111.72

Fv' = - 294 N.

## Answer This Question

## Related Questions

- physics - What is the minimum downward force on the box in the figure that will ...
- physics - What is the minimum downward force on the box in the figure that will ...
- physics - What is the minimum downward force on the box ( m=30 kg)that will keep...
- physics - Posted by norm on Monday, March 15, 2010 at 9:21am. What is the ...
- physics - box full of books rests on a wooden floor. The normal force the floor...
- Physics - an 88kg cardboard box is being pulled along a level floor. the ...
- physics - A person pulls with a force of 40 N on two boxes at rest. The top box ...
- physics - A person pulls with a force of 40 N on two boxes at rest. The top box ...
- Physics - A box of books weighing 337 N is shoved across the floor by a force of...
- physics - A box of books weighing 314 N is shoved across the floor by a force of...

More Related Questions