- #1

marjine

- 10

- 1

- Homework Statement
- A uniform horizontal bar of mass m and

length L = 1.59 m is held by a frictionless

pin at a wall. The opposite end of the strut is

supported by a cord with tension T at an angle θ. A block of mass 2 m is hung from thebar at a distance of 3/4 L from the pin. If the mass of the bar is mass m = 1.52 kg, find the magnitude of the horizontal component of the force of the wall acting on the bar

if the string makes an angle of 39.7◦ with the

horizontal.

The acceleration of gravity is 9.8 m/s

Answer in units of N.

- Relevant Equations
- Tnet = sum Ti

T=rFsinθ

T=Ia

Tnet = 0 = Tcord-Twall-Tmass

TLsinθ-2m(3/4L)-m(1/2)L

TLsinθ= -(3/2)mL-(1/2)mL

T=m/sinθ

T= (1.52)/sin(39.7) = 2.38N

TLsinθ-2m(3/4L)-m(1/2)L

TLsinθ= -(3/2)mL-(1/2)mL

T=m/sinθ

T= (1.52)/sin(39.7) = 2.38N