Thursday

April 24, 2014

April 24, 2014

Posted by **kelly** on Saturday, June 16, 2012 at 1:52pm.

In the previous problem if the coefficient of static friction is zero, to the nearest tenth of a degree, what would the incline angle have to be in order for the cord not to break?

- physics -
**Elena**, Saturday, June 16, 2012 at 4:34pmx: 0= m•g•sinα-T-F(fr),

y: 0 = - m•g•cos α +N.

F(fr) =k•N=k• m•g•cos α,

F(fr) = m•g•sinα – T,

k• m•g•cos α = m•g•sinα – T,

k= tan α – T/m•g•cos α =

=tan51º- 165/71•9.8•cos51 =

= 0.86.

If k=0,

tan α = T/m•g•cos α,

sin α/ cos α = T/m•g•cos α,

sin α = T/m•g =167/71•9.8 =0.24

α =13.88º

**Related Questions**

physics - What speed would a fly with a mass of 0.71 g need in order to have the...

physics - A 3.2 kg block sits on a frictionless table that has a hole cut in the...

physics - An automobile can be considered to be mounted on four identical ...

Matrices - [0; x] = [-0.71 0.71; -0.71 -0.71][0.015; 0] + [-0.71 0.71; -0.71 -0....

Physics - The drawing shows a large cube (mass = 48 kg) being accelerated across...

Physics - The drawing shows a large cube (mass = 25 kg) being accelerated across...

PHYSICS - The drawing shows a large cube (mass = 34 kg) being accelerated across...

physics - A woman stands on a scale in a moving elevator. Her mass is 71.0 kg, ...

physics - A weight (with a mass of 71 kg) is suspended from a point near the ...

Physics(Please help, thank you) - 1) A student, starting from rest, slides down ...